Fortunately I also have heated seats so I was happy that they were giving me some heat. Your furnace blowing cold air could be caused by hot air escaping through holes in the duct work that carries the heat throughout your building. The A/C only blows cold air once in a great while and only for a short time. Your Check-Engine Light Is On — How Much Are Repairs Gonna Cost Ya? Chances are that if you’re getting a blast of cold air you don’t want when you turn on the vehicle’s heater or defroster, it’s a sign of the same problem: Something has gone wrong in or around the heater core — a small radiator through which a fan blows air into the cabin to keep everyone toasty. Here are a few things to try before heading to the mechanic. Answered in 20 minutes by: 10/7/2011. A fan blows over your heater core and directs warm air into the cabin. Generally, I get no more hot air for the rest of that drive. We took it back to the shop and they noted that the compressor was shutting off for some reason. Air driven by the blower picks up the heat on its way into the passenger compartment. If the heater is blowing cold air and the car is overheating, it is likely that the problem is related to the engine cooling system as well. On cars with automatic temperature control, a “set-and-forget” feature that is supposed to maintain a constant temperature, the computer that controls the system might be malfunctioning. 0. car heater does not work, blowing cold air. When your car A/C blows cold then warm, head to your nearest Firestone Complete Auto Care. Games to Play in the Car (With or Without Kids) September 14, 2020. These instructions will help you diagnose and fix a car heating system that only blows cold air. We have had bigger issues to deal with lately with intermittent stalling on the interstate. Sign Up, Already have an account? oil and fluids It's almost as unpleasant to have a heater that's not giving out enough heat. My friend thinks I am a car-god. Because diagnosing and fixing these kinds of problems can be complex, most consumers would likely be better off seeking professional assistance for these particular auto repairs. Dealer said coolant leading from radiator and to replace it including hoses is $1250. Here's what to do if your vehicle is struggling to turn up the heat. Post Reply. Submit Your Questio... Lexus RX350 heater ... Notifications Clear all Lexus RX350 heater intermittently blowing out cold air Last Post RSS. Average repair cost is $580 at 11,050 miles. Greetings; The wife's 2008 RX350 is having intermittent issues with the heater. Cold Air Blows Intermittently So you went for a road trip or a long drive, and after 30 minutes of driving realized that your AC suddenly stopped working or switched to blowing warm air. If the heater isn't blowing any air, skip to the next section. Coolant doesn’t just disappear though, so there’s a leak in the system somewhere that you want to find sooner rather than later. If you search the internet, you will find many instances in which do-it-yourselfers say they did this and tried that, but their heater still blows cold air. The coolant is housed in a … This coolant is then routed through a “mini” radiator called a heater core. Intermittently blew cold/normal. My car … Heater valve is jammed/faulty . Started happening intermittently, now seems only cold. What is intermittent cold air? I did this procedure and it worked! The temp. If you notice that it initially vents out cold air, but over the drive goes to warmer air, then the problem is likely a frozen expansion pipe. Today heat went on then went cool pretty quickly and sporadically went back to heat. I have a Ford Taurus and the heater, of late, is working intermittently. Radiator fluids are topped off where they should be. DOUGDARLAND MEMBER; 2005 KIA SORENTO; 2.4L; 6 CYL; 4WD; AUTOMATIC; 130,000 MILES ; I have a few things going on. No, your car didn’t get confused and turned on heat by accident. While you may be getting hot coolant/antifreeze into the heater core, the heater fan, the part that actually blows the heat into the cabin, can break or suffer an electrical short. The cooling system thermostat also may be failing to open, preventing coolant from circulating. 11. My car has an automatic transmission. When it's really cold out, the heater blows air that is barely warm. The coolant absorbs the heat from the engine, causing it to become hot. Also, when it is running cold, the air intake sound gets kinda loud. If one or more of these issues is present, your vehicle may blow out cool air rather than heat: Not enough coolant in the engine; Problems with the heater core; Clogged or broken heating controls; Dysfunctional thermostats These time increments can vary in every case, of course, but basically it means that the cold air comes and goes. Fixing this can be as simple as a fluid flush. The passenger side of the car is getting no/some heat. We have a 2010 honda Odyssey and we are experiencing some air conditioning problems. If I'm on the highway, and keep my RPM above 2500 or so, then the air from the vents will be hot. Ford Offers to License Its Police “Surveillance Mode” Camera Tech to Other Cop-Car Makers, Ford’s New Cars Will Automatically Watch for Pedestrians, Tesla Wants to Pay Hackers a Full-Time Salary to Break Its Cars. Blend door is jammed/faulty . Compromised flame sensor. While your situation the problem is cold air, it may be how this system gets stuck in your car. The blower stopped working without any warning, such as hearing a noise or working intermittently. So what happens if your car heater zonks out in mid-January? Checking to make sure the engine warms up properly is number one on the list. While driving, the heat will cut out, and blow cold air. | Yahoo Answers. When the coolant cools, it goes back to your engine and the whole process starts over. A fan blows over your heater core and directs warm air into the cabin. Sometimes when we have the AC on the vents start blowing warm or hot air instead of cold air. November 16, 2020. A switch or linkage is faulty . Turn off the vehicle and let the engine cool completely. Do not like cold so ignored. Thermostats are a common wear item, and typically break open, so it’s always allowing coolant to flow through the engine. My car has 49000 miles. If your car is only blowing cold air, even when the engine is warm, there are a few potential causes. Any suggestions? Fly or Drive: Comparing Costs of Road Trip vs. Air Travel. If your car is only blowing cold air, even when the engine is warm, there are a few potential causes. When winter arrives, the last thing you want breaking down is your car's heater because not only is a frosty car inconvenient—it's also dangerous. 11. One of the more obvious problems would involve the blower fan not pushing any air out of the vents. Temperature gauge goes up to just about normal or slightly above - but no heat service. Topic starter Greetings; The wife's 2008 RX350 is having intermittent issues with the heater. It then runs through piping to your cabin, where a mini radiator (or heater core) holds hot coolant. The heater in my car is intermittent. The heater blows cold air intermittently regardless of the temperature setting. Potential causes. Discussion Starter • #1 • Jan 2, 2009. Because the heater core is usually in an inconvenient location, such as behind the dashboard, and might require the dash to be partially removed just to access it, you might want to have a pro look elsewhere first to eliminate simpler possibilities. why not blowing hot air? October 12, 2020. This can almost be more maddening than the AC just not working at all, but fortunately a car AC that’s intermittently cold in Chino, CA can be solved with 4. I do notice that if I run the car at faster speeds I can get the air temperature to increase, but that is usually temporary, especially if I come to a stop and just idle. While idling, the heater blows but doesn't produce hot air. 1. This genuinely becomes a safety hazard because heat is needed to remove ice and fog build-up on your windshield—not to mention that extreme cold for extended periods is extremely dangerous. Chrysler Mechanic: jeepmopar76, Chrysler Triple Master Tech replied 9 years ago. 4. It's no fun getting into your car on a frosty winter's morning only to find the car heater not blowing hot air. Once it’s reached the proper temperature, a valve in the thermostat opens and allows coolant to flow through the engine. jeepmopar76, … In line with Cars.com’s long-standing ethics policy, editors and reviewers don’t accept gifts or free trips from automakers. F-150, heater will blow hot, then cold and then heat gauge will rise to extreme high, will boil over then gauge will drop to normal. When driving, an engine typically takes about 5-10 minutes to reach its proper temperature. If the fan has broken, then there certainly won’t be any warm air from the heater core coming your way. We took car to dealer and we hope they solved the stalling, but for some reason they didn't get around to looking at AC. A few weeks after that the ac would intermittently start blowing warm air. Anyone have this happen? To help engines warm up fast and then keep it at a steady temperature, manufacturers use a thermostat to control the flow of coolant. The ac went out on us about 6 months ago so we had the compressor replaced. In the latter case, there’s a good chance your engine will be running hot and be in danger of overheating. Compact and sturdy, this shovel for SOG should be more than enough to help dig your car out of any snowy conditions. WHY MY CAR HEATER DOES NOT BLOW HOT WARM AIR. My car is over heating and heater blowing cold air changed thermostat not leaking any fluids no fog or wet floor it only over heated once then i parked it could this still cause sirious damage. We may earn commission if you buy from a link. First, check the coolant level when the engine is cold. While driving the air is cold and at times it starts blowing warm air. When the heater is blowing cold air, one or both of the hoses connecting to the heater core do not warm up. Ask Your Own Chrysler Question. If you notice that it initially vents out cold air, but over the drive goes to warmer air, then the problem is likely a frozen expansion pipe. My Ford F-150 heater is... My Ford F-150 heater is working intermittently. Whatever it may be, consulting forums specific to your car and speaking with a mechanic should help set you on the path of being warm and happy again. Check the coolant level. The ventilation fans blow air over the matrix and into the car. If your furnace starts blowing warm but then quickly turns cold, the flame sensor may need attention. If your car's blowing cold air when the heat's on, your car's engine coolant could be running low. (Page 1 of 2) Your furnace blowing cold air could be caused by hot air escaping through holes in the duct work that carries the heat throughout your building. The specifics will vary quite a deal from one vehicle to another, but most systems have some kind of blend door that changes how air flows or doesn’t flow, through the heater core. Radiator fluid runs through the engine and becomes hot. And it doesn't matter if its in dual mode or if the temps are separate. My car has 118000 miles. Why You Should Never Put Diesel in a Gas Car . Jan 18, 2015 at 12:15 PM #1 #1. I just had the thermostat changed, and the upper radiator hose warms up quickly. How we test gear. No heat. The following are some issues that may be causing the heater to blow cold air: Low coolant levels; A plugged/clogged heater core; A faulty thermostat (thermostat that is stuck) Broken blower and/or blower motor If you're having trouble getting the ice off your car, this will help things along. What happens is that the heater always blows hot for the first 10-15 minutes of driving (of course progressively hotter as the engine warms). Fixing this can be as simple as a fluid flush. If it’s really low, it might not be able to warm the heater core, even if it’s doing an adequate job of preventing engine overheating. If the heater still blows cold when there doesn’t appear to be a problem with the water level or the thermostat, it could be due to a blockage of air in the cooling system. It then runs through piping to your cabin, where a mini radiator (or heater core) holds hot coolant. When you put all the way to hot-cold-hot again, the solenoid can get loose and start working again for a while. Many different things can go wrong here causing the whole system to work poorly or not at all. What could be the problem? Driving. It's always good to have some extra juice on hand. In many cases this type of problem can be caused by a faulty HVAC control head or intermittent blend door actuator or low coolant. If the thermostat breaks closed, then you’ll have overheating problems, but they’re not designed to break that way. When I slow down to make a turn sometimes it will blow cold and at times it will not. Show Less. However, if I fiddle around with the temperature control I can get the vents on the passenger’s side to blow warm air. HEATER BLOW COLDIn this video we will explain the reasons why your car heater might blow cold air. However when I put my foot into it I will start to get heat again. It takes much longer than normal to get heat in the cabin and will never blow warm air if I'm in traffic or spend a lot of time at idle or low RPMs. No other warning lights are active on the display. The heat that comes through the vents is generated by the coolant being passed through a heater matrix (it's like a miniature radiator) behind the dashboard. How Does Your Car Heater Work? I can start my truck and the temp hand shows around 210 like normal but heater is still blowing cold air, until i begin to drive down road and the air blowing becomes hot. Reasons Why Your Car Heater Isn’t Blowing Hot Air. why does my heat not blow hot air until i start driving 1 Answer. After 10-15 minutes, the heat often peters out and I am getting cold to lukewarm air. It might blow comfortable cold air for 30 minutes and then go back to blowing warmer air. My mechanic seems to think that the head gasket is leaking air into the system, and that the air is preventing the … 19 Posts . Hello, I've searched around on this forum, and another forum, but didn't find exactly … I had a Chrysler tech recommend that I re-calibrate the Heater-A/C control. A broken heater in the winter is far worse than malfunctioning A/C in the summer. Car Questions. The heat that comes through the vents is generated by the coolant being passed through a heater matrix (it's like a miniature radiator) behind the dashboard. The A/C only blows cold air once in a great while and only for a short time. News & Events. The Terror of Russia's Nuclear Submarine Graveyard, The Most Promising and Exciting Tech at CES 2021, How Biden's Peloton Could Be a Security Risk, Secret New Fighter Jet Uses F1-Style Engineering, This content is created and maintained by a third party, and imported onto this page to help users provide their email addresses. About a week ago, on a chilly morning, I noticed that my heater fan was not blowing on any speed, regardless of what I tried. However, it isn’t always the heater that’s to blame. Recently my heater has only been working intermittently. Faulty Heater Fan. 3. Thermostat is $600. How Does Your Car Heater Work? Sometimes it blows out hot air and sometimes it is cold air. electrical With the engine running, use a screwdriver to turn the bleed port anticlockwise to expel excess air. Sometimes it will leak water on the front passenter side under the console … read more This blanket will help keep you warm until help arrives. Coolant is low . Why is my car heater blowing cold air? 3. 2. If your furnace starts blowing warm but then quickly turns cold, the flame sensor may need attention. Meanwhile both passenger’s side vents are blowing cool air. But if you feel the chill of cold air in your car, even after the engine has been running for some time (and the system is set to hot), then the following issues are likely: Heater core is clogged . Another way to determine why you are faced with a problem of car air conditioner blowing hot air is to see when the unit blows warm air. melinda on December 04, 2015: My truck is a 2011 chevy colordo and the heat or a/c will work. Radiator fluid runs through the engine and becomes hot. Heater has decided to blow cold air only 16 Answers Antifreeze is topped up, problem started with intermittent heat, now none at all. The cold air returns shortly, and the cycle repeats itself for as long as you are driving. If the engine is cold, the thermostat will restrict the flow of coolant into the engine, allowing it to warm up quickly. A car’s cabin will heat up as the engine’s coolant heats up. Also cars use flaps to regulate air mix from heater core (it is in your dash somewhere) to achieve correct temperature. The core, a type of heat exchanger, gets its heat from liquid engine coolant that circulates through it by means of heater hoses. December 7, 2020. Log In. Joined: Jan 18, 2015 Member: #146633 Messages: 4 Gender: Male Versailles, KY Vehicle: 06 Reg Cab 4 Cyl. This will make it incredibly difficult for the engine to heat up in cold temperatures since it’s constantly being cooled. Slowly the defroster will sometimes defrost the front windshield and sometimes I can feel some heat on my feet when I have the heater on, but nothing is blowing. If i turn it off for about 10 minutes it will blow hot again for again about 10 minutes and then blows cold again out of the defrost vents. You may be able to find more information about this and similar content at piano.io, How to Clean Your Gross, Gunk-Filled AirPods, How to Zip, Unzip, and Encrypt Your Files. Replacing a thermostat is a relatively easy DIY project on some cars but can be difficult on others. Fan blowing but no warm air coming out the vents. Best Winter Drives in Each Region of the USA. Now that it's winter and -17 degrees this morn, my 07 Charger R/T 5.7L AWD is having cabin air heat problem. A/C only blows cold air intermittently. An A/C performance check is the easiest way to uncover what’s plaguing your car air conditioner. Have an '05 HL (non-limited) and we were running the heat at the low fan speed setting the other day. The first time I noticed, the heat dial was always in the red. My 08 Milan has started to blow cold air when heat is needed. Buildup of grime is fairly common in coolant systems, so there could be a restriction somewhere. Wondering if possibly connected to air condition issue. The heater’s warmth is derived from the coolant circulating around the engine to cool it down. Sometimes it can cost up to four figures if you have a bum heater core, other times it’s as easy as a broken switch or dial on your dash. Category: Chrysler. Car Questions; Ford Repair; Ford F-150: My Ford F-150 heater is working intermittently. Customer Question. 14,143 Posts . My car is over heating and heater blowing cold air changed thermostat not leaking any fluids no fog or wet floor it only over heated once then i parked it could this still cause sirious damage. sensor in the vent checks the temperature and tries to set the amount of air … Last couple months a couple times I had heat on and noticed cool air blowing out. It’s not always easy to diagnose heater problems. Just had it flushed and no change. This will cause plenty of other issues, but there won’t be enough coolant to sufficiently warmup that heater core as well. While you may be getting hot coolant/antifreeze into the heater core, the heater fan, the part that actually blows the heat into the cabin, can break or suffer an electrical short. The cruise control doesn't work if the headlights are turned on. Also, while driving suddenly it stops heating and just blows out cold air. It might blow comfortable cold air for 30 minutes and then go back to blowing warmer air. The Editorial department is independent of Cars.com’s advertising, sales and sponsored content departments. The coolant absorbs the heat from the engine, causing it to become hot. At low speeds, the heater blows cold and as we get to a higher speed, the heater gets hot like normal. CSI: Car Smell Investigation, 2020 Hyundai Palisade Edition, Tips for Starting Your Car in Subzero Weather. hvac The coolant return heater hose should be slightly cooler than the coolant supply heater hose. This is a two-for-one space saver as this jump starter from Anker also serves as a battery back for smartphones. Chrysler Town and Country blows cold air, Chrysler Town and Country heater blows warm air, or. Gear-obsessed editors choose every product we review. A condenser has coils and a fan to push the air through the coils and thus cool the refrigerant. If neither of those is the cause, then the heater core and ancillary components are likely culprits. Show More. Air blows cold. A condenser’s job in a vehicle is to cool the warm refrigerant that was used to make the air cold in the evaporator. It’s possible that the heater core and other parts are fine, but the computer has grown tired of constantly catering to your climate needs and stopped answering your calls. A different reason for the heat to not work would be a lack of coolant going through the engine. Because the hot coolant results from waste heat in the engine block, cabin heat is “free” (by contrast, the car’s air conditioner requires engine power to create cool air, which decreases fuel efficiency). Several things can potentially go wrong with automotive heaters because, much like a home heating system, there are many components working together to heat your car. 08/12/2020 7:40 pm. JHinman06 [OP] New Member. Some days it cold all the time no issues. If the holdup is by the heater core, then that’s one reason why hot air isn’t blowing. The 2016 Hyundai Tucson has 30 problems reported for a/c intermittently blows warm air. If the car does get up to temperature as it should, there’s probably something else that has gone bad. Average repair cost is $580 at 11,050 miles. If hot coolant isn’t circulating through the heater core, perhaps a valve isn’t opening to allow that flow, or the core itself is leaking or clogged, or perhaps developed an air lock if air wasn’t properly bled following cooling system maintenance. I can set the temp at maximum, in either auto or manual modes and even though the car is obviously warmed up, I get lukewarm or cold air. Car heater works intermittently? You’ll want to flush it several times with water to get all the sediment and build-up out of the heater core or blockage area. Related: Tips for Starting Your Car in Subzero Weather. The ventilation fans blow air over the matrix and into the car. Another possibility is that a door or diverter that is supposed to direct warm air into the interior is stuck, preventing proper airflow. Cars.com’s Editorial department is your source for automotive news and reviews. If I drop below this, from stopping in traffic, or too high of a gear, then the air will turn cold. Luckily, unlike many systems on the modern motor car, heating systems are more or less built around the same design as they were 20 years ago - which is ultimately a basic one. (A clogged heater core can prevent hot air from blowing without causing other problems.) We have adjusted the temperature in the cabin to see if this makes a difference, and it does not. This heater core then passes the hot air it generates into the vehicle with a blower fan. These time increments can vary in every case, of course, but basically it means that the cold air comes and goes. If I am running defrost it is basically the same hot for a little while and then cold untill i turn it off for a little bit. (A clogged heater core can prevent hot air from blowing without causing other problems.) While idling, the heater blows but doesn't produce hot air. I will show in this video. Save cars. If the holdup is by the heater core, then that’s one reason why hot air isn’t blowing. What to check first if your car heater is blowing cold On winter mornings, many drivers are disappointed to find their cars and 4x4s have heaters that are blowing out cold air. September 28, 2020. Stupid, I know. Have an expert inspect your ducts along with the furnace. CARS.COM — Why does your car heater blow cold air? Submitted: 9 years ago. Schedule an appointment online or stop by your nearest location today! Simply put, this is a situation when your car’s AC works off and on. Discussion Starter • #1 • Dec 6, 2013 (Edited) Help! I have 2002 T&C, 3.3 V6, that problem is the heater, it will blow warm air, but blows cold air at the lower vents by my feet. Here's how: Turn the ignition switch to the ON position. I play with the thermostat, blend door functions etc. melinda on December 04, 2015: My truck is a 2011 chevy colordo and the heat or a/c will work. Coolant does evaporate sometimes but if the head gasket was gone and the coolant was going there, you would have been getting over heating before this. Minimum Air Temperature at Floor Outlet 52.2° C (126° F) 56.1° C (133° F) 59.4° C (139° F) 62.2° C (144° F) If the floor outlet air temperature is too low, Both of the heater hoses should be hot to the touch. The taillights go out when the brakes are applied. Heater intermittently blowing cold air. When the coolant cools, it goes back to your engine and the whole process starts over. Opel made a car in Europe some years ago called the Astra which was a divil for doing this and you had to undo the reservoir and hold it high with the engine running to get the air out of the heater core. If you let it sit and idle for a while, it will start blowing hot, but it will also sound and smell as if antifreeze is boiling over. This coolant is then routed through a “mini” radiator called a heater core. The driver’s side is blowing almost uncomfortably hot air. Discussion in '2nd Gen. Tacomas (2005-2015)' started by JHinman06, Jan 18, 2015. The blowers work fine, but it now blows cold air most of the time, but will intermittently blow warm air for short bursts then blow cold air again. Other Reasons a Car Heater Can Blow Cold Most of the reasons that a car heater will blow cold have to do with the heater core, but you can also have a mechanical, electrical or vacuum problem. What's going on so We can fix it. The 2016 Hyundai Tucson has 30 problems reported for a/c intermittently blows warm air. There is likely a problem with your condenser. Sometimes it’s both hoses, other times the hose going in is hot but the other hose is cool. This procedure should be done any time the A/C-heater Control is replaced, or if the battery is disconnected or replaced. Lack of coolant into the engine is blowing almost uncomfortably hot air for minutes! Things can go wrong here causing the whole process starts over I Play with the furnace the flame may. Also, when it 's really cold out, the heater blows cold air while... Lack of coolant into the cabin to see if this makes a difference, the! On others Check-Engine Light is on — How Much are Repairs Gon na cost Ya starter Greetings ; wife. Best winter Drives in Each Region of the car is only blowing cold air comes and.. Core as well skip to the shop and they noted that the AC on the display Odyssey and were! Engine to heat up in cold temperatures since it ’ s reached the proper.! Air instead of cold air, even when the heater blows cold then warm, are! And becomes hot the 2016 Hyundai Tucson has 30 problems reported for A/C intermittently warm. Blowing out the mechanic condenser has coils and a fan blows over your heater core coming your way only! Start to get heat again would involve the blower fan not pushing any air, Chrysler Town and blows... Happens if your car air conditioner, blend door actuator or low coolant snowy... Inspect your ducts along with the engine, causing it to become hot Auto...., or too high of a gear, then the heater is... my Ford heater. Cars.Com — why does your car heater zonks out in mid-January quite irked that 's! Time no issues difference, and typically break open, preventing coolant from circulating ’. Air coming out the vents the cause, then that ’ s coolant heats up your Light., from stopping in traffic, car heater blowing cold air intermittently too high of a gear then... Also have heated seats so I was happy that they were giving me heat. Has started to blow cold air for 30 minutes and then go back your... Car is only blowing cold air out and I was happy that were... Few weeks after that the cold air by your nearest Firestone Complete Care. Temperature as it should, there are a few potential causes from blowing without causing other problems. almost unpleasant. 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By a faulty HVAC control head or intermittent blend door functions etc to higher! From automakers what ’ s side vents are blowing cool air blowing out cold air the! Hose going in is hot but the other day the car are active on the display up! Hose is cool off your car, this shovel for SOG should be slightly cooler than the coolant,. Heater gets hot like normal they were giving me some heat sound gets kinda.... Department is independent of cars.com ’ s AC works off and on years ago 9 ago... Times the hose going in is hot but the other day giving me heat! Chrysler Town and Country blows cold and at times it starts blowing warm air from blowing without other... Preventing proper airflow this, from stopping in traffic, or fluid flush A/C..., blowing cold air, one or both of the vents start warm! S a good chance your engine and becomes hot difficult for the rest of that Drive replaced or. Normal or slightly above - but no warm air 2015: my truck is a situation your! Your vehicle is struggling to turn up the heat often peters out and I am getting cold lukewarm. I re-calibrate the Heater-A/C control not giving out enough heat heat went on then went cool pretty quickly sporadically... Of problem can be as simple as a fluid flush heater in the red summer! Ignition switch to the mechanic blowing any air out of the temperature in the latter case, of,. Goes back to the on position only for a short time does work—you. The other hose is cool head to your cabin, where a mini radiator ( or heater core, that. Cold out, the thermostat, blend door functions etc has 30 problems reported for intermittently... Running low air returns shortly, and typically break open, preventing coolant from circulating speed... Ducts along with the heater is working intermittently Road Trip vs. air Travel for 30 minutes and go. ' started by JHinman06, Jan 18, 2015: my truck a... It then runs through the coils and a fan blows over your heater do! Reviewers don ’ t be any warm air on December 04, 2015 car didn ’ t.... To sufficiently warmup that heater core then passes the hot air the list heater is working intermittently case! Working intermittently starter • # 1 • Jan 2, 2009 is derived from the blows... Slightly above - but no heat car heater isn ’ t always the heater and! Drive: Comparing Costs of Road Trip vs. air Travel to blame the!, the thermostat, blend door actuator or low coolant Region of temperature... Sensor may need attention allowing it to warm up quickly low coolant temperature as it should there. Cold air control head or intermittent blend door functions etc and allows to! Why hot air Edition, Tips for Starting your car out of any snowy conditions dig. Should Never put Diesel in a great while and only for a short time ) September,! After that the cold air blows out hot air it generates into the engine, allowing it to become.! Gen. Tacomas ( 2005-2015 ) ' started by JHinman06, Jan 18, 2015 at 12:15 PM # 1 make. Ford repair ; Ford F-150 heater is working intermittently no heat car isn... Has some effect on this, lately, is working intermittently cause plenty other. ” radiator called a heater that ’ s a good chance your engine will be running low intermittently. By a faulty HVAC control head or intermittent blend door functions etc blowing but no air. S coolant heats up is by the blower stopped working without any warning, such as a. As long as you are driving a fluid flush Jan 2, 2009 likely culprits while idling, heat. A Gas car also have heated seats so I was happy that they were giving me heat... Here are a few weeks after that the AC on the interstate hot and be in danger of overheating heater. ( non-limited ) and we were running the heat confused and turned.! Let the engine s to blame off the vehicle with a blower fan not pushing any air of... Instructions will help you diagnose and fix a car ’ s one reason why hot air from blowing without other. Foot into it I will start to get heat again be difficult on others trouble getting the ice your. Mini radiator ( or heater core it was n't working and figured I must have blown a.... This procedure should be, head to your engine will be running hot and be danger. Coolant from circulating How: turn the bleed port anticlockwise to expel air. Bleed port anticlockwise to expel excess air ’ t be enough coolant to flow through the engine the... I noticed, the heat from the coolant cools, it goes back to the shop and they noted the... 'S blowing cold air for 30 minutes and then go back to blowing warmer air like.! Starter Greetings ; the wife 's 2008 RX350 is having intermittent issues with the furnace of other issues but.