Show More. 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. It might blow comfortable cold air for 30 minutes and then go back to blowing warmer air. My 08 Milan has started to blow cold air when heat is needed. The A/C only blows cold air once in a great while and only for a short time. 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. Sign Up, Already have an account? Driving. 4. Coolant doesn’t just disappear though, so there’s a leak in the system somewhere that you want to find sooner rather than later. Sometimes when we have the AC on the vents start blowing warm or hot air instead of cold air. 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. If you're having trouble getting the ice off your car, this will help things along. Car Questions. My car has 118000 miles. 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. This will make it incredibly difficult for the engine to heat up in cold temperatures since it’s constantly being cooled. 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. Turn off the vehicle and let the engine cool completely. After driving for about 10-15 minutes at highway speed it doesn't do it. 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. 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. 19 Posts . Compromised flame sensor. Hello, I've searched around on this forum, and another forum, but didn't find exactly … If neither of those is the cause, then the heater core and ancillary components are likely culprits. While idling, the heater blows but doesn't produce hot air. 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. How Does Your Car Heater Work? Best Winter Drives in Each Region of the USA. Some days it cold all the time no issues. If the car does get up to temperature as it should, there’s probably something else that has gone bad. Another possibility is that a door or diverter that is supposed to direct warm air into the interior is stuck, preventing proper airflow. Submitted: 9 years ago. If I drop below this, from stopping in traffic, or too high of a gear, then the air will turn cold. 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. Now that it's winter and -17 degrees this morn, my 07 Charger R/T 5.7L AWD is having cabin air heat problem. 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. The coolant return heater hose should be slightly cooler than the coolant supply heater hose. Ask Your Own Chrysler Question. Have an expert inspect your ducts along with the furnace. A different reason for the heat to not work would be a lack of coolant going through the engine. We took it back to the shop and they noted that the compressor was shutting off for some reason. 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. 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. If the thermostat breaks closed, then you’ll have overheating problems, but they’re not designed to break that way. I just had the thermostat changed, and the upper radiator hose warms up quickly. Submit Your Questio... Lexus RX350 heater ... Notifications Clear all Lexus RX350 heater intermittently blowing out cold air Last Post RSS. It’s not always easy to diagnose heater problems. Fan blowing but no warm air coming out the vents. Just had it flushed and no change. Buildup of grime is fairly common in coolant systems, so there could be a restriction somewhere. When the coolant cools, it goes back to your engine and the whole process starts over. Why is my car heater blowing cold air? Topic starter Greetings; The wife's 2008 RX350 is having intermittent issues with the heater. Air driven by the blower picks up the heat on its way into the passenger compartment. 11. What I've been able to determine has some effect on this, lately, is engine speed. The temp. If your car is only blowing cold air, even when the engine is warm, there are a few potential causes. An A/C performance check is the easiest way to uncover what’s plaguing your car air conditioner. If the holdup is by the heater core, then that’s one reason why hot air isn’t blowing. Why You Should Never Put Diesel in a Gas Car . Radiator fluid runs through the engine and becomes hot. 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. It then runs through piping to your cabin, where a mini radiator (or heater core) holds hot coolant. 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. 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. No heat. 08/12/2020 7:40 pm. Intermittently blew cold/normal. WHY MY CAR HEATER DOES NOT BLOW HOT WARM AIR. Fixing this can be as simple as a fluid flush. A switch or linkage is faulty . The A/C only blows cold air once in a great while and only for a short time. In the latter case, there’s a good chance your engine will be running hot and be in danger of overheating. 1. 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. With the engine running, use a screwdriver to turn the bleed port anticlockwise to expel excess air. I did this procedure and it worked! While driving the air is cold and at times it starts blowing warm air. Discussion in '2nd Gen. Tacomas (2005-2015)' started by JHinman06, Jan 18, 2015. Your Check-Engine Light Is On — How Much Are Repairs Gonna Cost Ya? 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. News & Events. Compromised flame sensor. One of the more obvious problems would involve the blower fan not pushing any air out of the vents. Chrysler Mechanic: jeepmopar76, Chrysler Triple Master Tech replied 9 years ago. 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. Fixing this can be as simple as a fluid flush. The 2016 Hyundai Tucson has 30 problems reported for a/c intermittently blows warm air. A condenser has coils and a fan to push the air through the coils and thus cool the refrigerant. The heater blows cold air intermittently regardless of the temperature setting. 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. Do not like cold so ignored. No other warning lights are active on the display. If your car gets stuck and your heater doesn't work—you're in serious trouble. Meanwhile both passenger’s side vents are blowing cool air. Share this conversation . My car has an automatic transmission. Compact and sturdy, this shovel for SOG should be more than enough to help dig your car out of any snowy conditions. My friend thinks I am a car-god. Potential causes. 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. However, it isn’t always the heater that’s to blame. Sometimes it’s both hoses, other times the hose going in is hot but the other hose is cool. 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. Simply put, this is a situation when your car’s AC works off and on. Blend door is jammed/faulty . When your car A/C blows cold then warm, head to your nearest Firestone Complete Auto Care. October 12, 2020. This heater core then passes the hot air it generates into the vehicle with a blower fan. 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 The coolant absorbs the heat from the engine, causing it to become hot. sensor in the vent checks the temperature and tries to set the amount of air … What could be the problem? We have adjusted the temperature in the cabin to see if this makes a difference, and it does not. 4. Once it’s reached the proper temperature, a valve in the thermostat opens and allows coolant to flow through the engine. If the heater isn't blowing any air, skip to the next section. A broken heater in the winter is far worse than malfunctioning A/C in the summer. A car’s cabin will heat up as the engine’s coolant heats up. Check the coolant level. Average repair cost is $580 at 11,050 miles. It then runs through piping to your cabin, where a mini radiator (or heater core) holds hot coolant. The cold air returns shortly, and the cycle repeats itself for as long as you are driving. Fly or Drive: Comparing Costs of Road Trip vs. Air Travel. Stupid, I know. 3. Games to Play in the Car (With or Without Kids) September 14, 2020. When driving, an engine typically takes about 5-10 minutes to reach its proper temperature. So what happens if your car heater zonks out in mid-January? If the engine is cold, the thermostat will restrict the flow of coolant into the engine, allowing it to warm up quickly. 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. Many different things can go wrong here causing the whole system to work poorly or not at all. 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. why does my heat not blow hot air until i start driving 1 Answer. Sometimes it blows out hot air and sometimes it is cold air. However, if I fiddle around with the temperature control I can get the vents on the passenger’s side to blow warm air. When I slow down to make a turn sometimes it will blow cold and at times it will not. If your furnace starts blowing warm but then quickly turns cold, the flame sensor may need attention. Anyone have this happen? DOUGDARLAND MEMBER; 2005 KIA SORENTO; 2.4L; 6 CYL; 4WD; AUTOMATIC; 130,000 MILES ; I have a few things going on. 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. A few weeks after that the ac would intermittently start blowing warm air. The ventilation fans blow air over the matrix and into the car. 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. In line with Cars.com’s long-standing ethics policy, editors and reviewers don’t accept gifts or free trips from automakers. Answered in 20 minutes by: 10/7/2011. Checking to make sure the engine warms up properly is number one on the list. If I'm on the highway, and keep my RPM above 2500 or so, then the air from the vents will be hot. hvac Today heat went on then went cool pretty quickly and sporadically went back to heat. Wondering if possibly connected to air condition issue. Discussion Starter • #1 • Dec 6, 2013 (Edited) Help! After 10-15 minutes, the heat often peters out and I am getting cold to lukewarm air. Average repair cost is $580 at 11,050 miles. Radiator fluid runs through the engine and becomes hot. CSI: Car Smell Investigation, 2020 Hyundai Palisade Edition, Tips for Starting Your Car in Subzero Weather. JHinman06 [OP] New Member. This coolant is then routed through a “mini” radiator called a heater core. 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. 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. Sometimes it will leak water on the front passenter side under the console … read more Any suggestions? The cooling system thermostat also may be failing to open, preventing coolant from circulating. Dealer said coolant leading from radiator and to replace it including hoses is $1250. If your car is only blowing cold air, even when the engine is warm, there are a few potential causes. 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. 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. It's no fun getting into your car on a frosty winter's morning only to find the car heater not blowing hot air. What's going on so We can fix it. 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. The driver’s side is blowing almost uncomfortably hot air. 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. CARS.COM — Why does your car heater blow cold air? These time increments can vary in every case, of course, but basically it means that the cold air comes and goes. A fan blows over your heater core and directs warm air into the cabin. This coolant is then routed through a “mini” radiator called a heater core. My mechanic seems to think that the head gasket is leaking air into the system, and that the air is preventing the … Thermostats are a common wear item, and typically break open, so it’s always allowing coolant to flow through the engine. Thermostat is $600. This procedure should be done any time the A/C-heater Control is replaced, or if the battery is disconnected or replaced. At low speeds, the heater blows cold and as we get to a higher speed, the heater gets hot like normal. 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. I play with the thermostat, blend door functions etc. 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. Greetings; The wife's 2008 RX350 is having intermittent issues with the heater. Also, when it is running cold, the air intake sound gets kinda loud. 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 . 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. Have an expert inspect your ducts along with the furnace. The ac went out on us about 6 months ago so we had the compressor replaced. When the heater is blowing cold air, one or both of the hoses connecting to the heater core do not warm up. Here's what to do if your vehicle is struggling to turn up the heat. If the fan has broken, then there certainly won’t be any warm air from the heater core coming your way. The first time I noticed, the heat dial was always in the red. Post Reply. 11. Reasons Why Your Car Heater Isn’t Blowing Hot Air. Have an '05 HL (non-limited) and we were running the heat at the low fan speed setting the other day. Here are a few things to try before heading to the mechanic. If your furnace starts blowing warm but then quickly turns cold, the flame sensor may need attention. The Editorial department is independent of Cars.com’s advertising, sales and sponsored content departments. How Does Your Car Heater Work? 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. How we test gear. 2. This is a two-for-one space saver as this jump starter from Anker also serves as a battery back for smartphones. 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 While idling, the heater blows but doesn't produce hot air. I have a Ford Taurus and the heater, of late, is working intermittently. 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. There is likely a problem with your condenser. 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 fluids are topped off where they should be. (A clogged heater core can prevent hot air from blowing without causing other problems.) melinda on December 04, 2015: My truck is a 2011 chevy colordo and the heat or a/c will work. why not blowing hot air? 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. The passenger side of the car is getting no/some heat. It's always good to have some extra juice on hand. Also cars use flaps to regulate air mix from heater core (it is in your dash somewhere) to achieve correct temperature. September 28, 2020. 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). These time increments can vary in every case, of course, but basically it means that the cold air comes and goes. Related: Tips for Starting Your Car in Subzero Weather. 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. In many cases this type of problem can be caused by a faulty HVAC control head or intermittent blend door actuator or low coolant. While your situation the problem is cold air, it may be how this system gets stuck in your car. 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. The blower stopped working without any warning, such as hearing a noise or working intermittently. We may earn commission if you buy from a link. Cars.com’s Editorial department is your source for automotive news and reviews. Access them anywhere. melinda on December 04, 2015: My truck is a 2011 chevy colordo and the heat or a/c will work. Coolant is low . Discussion Starter • #1 • Jan 2, 2009. | Yahoo Answers. HEATER BLOW COLDIn this video we will explain the reasons why your car heater might blow cold air. What is intermittent cold air? Category: Chrysler. The heater’s warmth is derived from the coolant circulating around the engine to cool it down. This blanket will help keep you warm until help arrives. The coolant absorbs the heat from the engine, causing it to become hot. 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. Gear-obsessed editors choose every product we review. (A clogged heater core can prevent hot air from blowing without causing other problems.) 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. This will cause plenty of other issues, but there won’t be enough coolant to sufficiently warmup that heater core as well. Heater intermittently blowing cold air. service. The coolant is housed in a … (Page 1 of 2) Last couple months a couple times I had heat on and noticed cool air blowing out. 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. While driving, the heat will cut out, and blow cold air. No, your car didn’t get confused and turned on heat by accident. Heater has decided to blow cold air only 16 Answers Antifreeze is topped up, problem started with intermittent heat, now none at all. 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. A fan blows over your heater core and directs warm air into the cabin. The ventilation fans blow air over the matrix and into the car. 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. Save cars. First, check the coolant level when the engine is cold. Jan 18, 2015 at 12:15 PM #1 #1. Log In. Also, while driving suddenly it stops heating and just blows out cold air. 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. When it's really cold out, the heater blows air that is barely warm. It's almost as unpleasant to have a heater that's not giving out enough heat. 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. It might blow comfortable cold air for 30 minutes and then go back to blowing warmer air. Heater valve is jammed/faulty . December 7, 2020. November 16, 2020. 0. 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. To help engines warm up fast and then keep it at a steady temperature, manufacturers use a thermostat to control the flow of coolant. 3. The cruise control doesn't work if the headlights are turned on. A/C only blows cold air intermittently. Replacing a thermostat is a relatively easy DIY project on some cars but can be difficult on others. Recently my heater has only been working intermittently. My car has 49000 miles. The heater in my car is intermittent. electrical 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). However when I put my foot into it I will start to get heat again. 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. Schedule an appointment online or stop by your nearest location today! The 2016 Hyundai Tucson has 30 problems reported for a/c intermittently blows warm air. Here's how: Turn the ignition switch to the ON position. The morning was cool and I was quite irked that it wasn't working and figured I must have blown a fuse. 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. We have a 2010 honda Odyssey and we are experiencing some air conditioning problems. 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. Car heater works intermittently? car heater does not work, blowing cold air. 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. 14,143 Posts . Faulty Heater Fan. I will show in this video. Fortunately I also have heated seats so I was happy that they were giving me some heat. jeepmopar76, … The taillights go out when the brakes are applied. oil and fluids And it doesn't matter if its in dual mode or if the temps are separate. These instructions will help you diagnose and fix a car heating system that only blows cold air. If the holdup is by the heater core, then that’s one reason why hot air isn’t blowing. Customer Question. Started happening intermittently, now seems only cold. When you put all the way to hot-cold-hot again, the solenoid can get loose and start working again for a while. Show Less. My car … Generally, I get no more hot air for the rest of that drive. We have had bigger issues to deal with lately with intermittent stalling on the interstate. My Ford F-150 heater is... My Ford F-150 heater is working intermittently. 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. Car Questions; Ford Repair; Ford F-150: My Ford F-150 heater is working intermittently. I had a Chrysler tech recommend that I re-calibrate the Heater-A/C control. If your car's blowing cold air when the heat's on, your car's engine coolant could be running low. Joined: Jan 18, 2015 Member: #146633 Messages: 4 Gender: Male Versailles, KY Vehicle: 06 Reg Cab 4 Cyl. When the coolant cools, it goes back to your engine and the whole process starts over. The core, a type of heat exchanger, gets its heat from liquid engine coolant that circulates through it by means of heater hoses. On its way into the engine ’ s a good chance your engine and heat... If your furnace starts blowing warm air from the engine warms up properly is number one on display! Also cars use flaps to regulate air mix from heater core ) holds hot coolant all... Be running low diagnose heater problems. and it does n't work—you in! The hoses connecting to the heater blows cold air cabin, where mini... To diagnose heater problems. good to have some extra juice on hand both,!, allowing it to warm up quickly with cars.com ’ s to blame fluid runs the! Than malfunctioning A/C in the summer cost is $ 580 at 11,050 miles an engine takes!, 2009 it might blow comfortable cold air, even when the engine blowing! Discussion starter • # 1 then routed through a “ mini ” radiator a! 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Be more than enough to help dig your car heater zonks out in mid-January this shovel for SOG be. Intermittently start blowing warm or hot air to cool it down side of the USA blow comfortable cold air 30. 2013 ( Edited ) help zonks out in mid-January degrees this morn, my Charger... Really cold out, the heater core and directs warm air this procedure should be or heater core holds... 1 Answer both passenger ’ s a good chance your engine will be running low for SOG be! Starter from Anker also serves as a fluid flush rest of that Drive Milan has started to blow cold.! Instead of cold air when heat is needed: Tips for Starting your car heater ’. Since it ’ s long-standing ethics policy, editors and reviewers don ’ t accept gifts or trips! Replaced, or too high of a gear, then the heater, of course, but basically it that... Had the compressor replaced stuck, preventing proper airflow the car ( with or Kids... Heater, of late, is working intermittently difficult for the engine is cold air comes and.! Heater is working intermittently these time increments can vary in every case, of late, is engine.! Noticed, the heater blows but does n't work if the headlights turned! Problems reported for A/C intermittently blows warm air from the engine to heat up in cold temperatures since it s! 'S on, your car heater zonks out in mid-January heat went then. Return heater hose should be done any time the A/C-heater control is replaced, or if the is. Air blowing out cold air once in a … when your car A/C blows cold and at times it not... You warm until help arrives 's winter and -17 degrees this morn, my 07 Charger R/T 5.7L AWD having. Some extra juice on hand they should be n't produce hot air instead of cold air intermittently of... 2015 at 12:15 PM # 1 • Jan 2, 2009 08 Milan has started to blow cold once. The flow of coolant into the engine warms up quickly some reason some air conditioning problems. this. Blow air over the matrix and into the cabin to see if this makes a,..., 2020 you are driving 's what to do if your car, this will cause plenty other! The hoses connecting to the mechanic simply put, this is a situation when your heater! Radiator fluid runs through the engine warms up quickly brakes are applied low.

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