October 12, 2020. After driving for about 10-15 minutes at highway speed it doesn't do it. The cold air returns shortly, and the cycle repeats itself for as long as you are driving. 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. Heater valve is jammed/faulty . Today heat went on then went cool pretty quickly and sporadically went back to heat. My car … WHY MY CAR HEATER DOES NOT BLOW HOT WARM AIR. It might blow comfortable cold air for 30 minutes and then go back to blowing warmer air. It might blow comfortable cold air for 30 minutes and then go back to blowing warmer air. 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. Also, while driving suddenly it stops heating and just blows out cold air. Discussion Starter • #1 • Jan 2, 2009. 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. How we test gear. Ask Your Own Chrysler Question. Once it’s reached the proper temperature, a valve in the thermostat opens and allows coolant to flow through the engine. 4. A different reason for the heat to not work would be a lack of coolant going through the engine. 14,143 Posts . Blend door is jammed/faulty . Heater has decided to blow cold air only 16 Answers Antifreeze is topped up, problem started with intermittent heat, now none at all. I play with the thermostat, blend door functions etc. This procedure should be done any time the A/C-heater Control is replaced, or if the battery is disconnected or replaced. Cars.com’s Editorial department is your source for automotive news and reviews. 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. Here's what to do if your vehicle is struggling to turn up the heat. September 28, 2020. A car’s cabin will heat up as the engine’s coolant heats up. If your car is only blowing cold air, even when the engine is warm, there are a few potential causes. 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. 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. (Page 1 of 2) How Does Your Car Heater Work? My mechanic seems to think that the head gasket is leaking air into the system, and that the air is preventing the … Here are a few things to try before heading to the mechanic. 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. 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. My car has 49000 miles. If your furnace starts blowing warm but then quickly turns cold, the flame sensor may need attention. If the engine is cold, the thermostat will restrict the flow of coolant into the engine, allowing it to warm up quickly. service. Save cars. The ventilation fans blow air over the matrix and into the car. The coolant absorbs the heat from the engine, causing it to become hot. We have had bigger issues to deal with lately with intermittent stalling on the interstate. Fly or Drive: Comparing Costs of Road Trip vs. Air Travel. Topic starter Greetings; The wife's 2008 RX350 is having intermittent issues with the heater. Compact and sturdy, this shovel for SOG should be more than enough to help dig your car out of any snowy conditions. If the heater isn't blowing any air, skip to the next section. car heater does not work, blowing cold air. I just had the thermostat changed, and the upper radiator hose warms up quickly. Jan 18, 2015 at 12:15 PM #1 #1. Why You Should Never Put Diesel in a Gas Car . Anyone have this happen? Replacing a thermostat is a relatively easy DIY project on some cars but can be difficult on others. If your car gets stuck and your heater doesn't work—you're in serious trouble. 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. 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. So what happens if your car heater zonks out in mid-January? DOUGDARLAND MEMBER; 2005 KIA SORENTO; 2.4L; 6 CYL; 4WD; AUTOMATIC; 130,000 MILES ; I have a few things going on. The A/C only blows cold air once in a great while and only for a short time. 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. 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). Category: Chrysler. 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. melinda on December 04, 2015: My truck is a 2011 chevy colordo and the heat or a/c will work. A condenser has coils and a fan to push the air through the coils and thus cool the refrigerant. My Ford F-150 heater is... My Ford F-150 heater is working intermittently. These time increments can vary in every case, of course, but basically it means that the cold air comes and goes. It’s not always easy to diagnose heater problems. If you're having trouble getting the ice off your car, this will help things along. Have an expert inspect your ducts along with the furnace. Chrysler Mechanic: jeepmopar76, Chrysler Triple Master Tech replied 9 years ago. Hello, I've searched around on this forum, and another forum, but didn't find exactly … There is likely a problem with your condenser. 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 . How Does Your Car Heater Work? 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 your situation the problem is cold air, it may be how this system gets stuck in your car. 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 The cooling system thermostat also may be failing to open, preventing coolant from circulating. News & Events. Sometimes when we have the AC on the vents start blowing warm or hot air instead of cold air. Show Less. It then runs through piping to your cabin, where a mini radiator (or heater core) holds hot coolant. However, if I fiddle around with the temperature control I can get the vents on the passenger’s side to blow warm air. What is intermittent cold air? When the coolant cools, it goes back to your engine and the whole process starts over. No, your car didn’t get confused and turned on heat by accident. The cruise control doesn't work if the headlights are turned on. The first time I noticed, the heat dial was always in the red. Radiator fluid runs through the engine and becomes hot. 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. Simply put, this is a situation when your car’s AC works off and on. I have a Ford Taurus and the heater, of late, is working intermittently. 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. And it doesn't matter if its in dual mode or if the temps are separate. Car heater works intermittently? The 2016 Hyundai Tucson has 30 problems reported for a/c intermittently blows warm air. 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. To help engines warm up fast and then keep it at a steady temperature, manufacturers use a thermostat to control the flow of coolant. Also cars use flaps to regulate air mix from heater core (it is in your dash somewhere) to achieve correct temperature. 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. After 10-15 minutes, the heat often peters out and I am getting cold to lukewarm air. The heater blows cold air intermittently regardless of the temperature setting. If neither of those is the cause, then the heater core and ancillary components are likely culprits. With the engine running, use a screwdriver to turn the bleed port anticlockwise to expel excess air. 11. The temp. Air blows cold. If your furnace starts blowing warm but then quickly turns cold, the flame sensor may need attention. The coolant is housed in a … Sometimes it’s both hoses, other times the hose going in is hot but the other hose is cool. The heater’s warmth is derived from the coolant circulating around the engine to cool it down. I did this procedure and it worked! This blanket will help keep you warm until help arrives. oil and fluids If the holdup is by the heater core, then that’s one reason why hot air isn’t blowing. In the latter case, there’s a good chance your engine will be running hot and be in danger of overheating. 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. 2. If I drop below this, from stopping in traffic, or too high of a gear, then the air will turn cold. These instructions will help you diagnose and fix a car heating system that only blows cold air. Sometimes it will leak water on the front passenter side under the console … read more Last couple months a couple times I had heat on and noticed cool air blowing out. (A clogged heater core can prevent hot air from blowing without causing other problems.) Here's how: Turn the ignition switch to the ON position. 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. November 16, 2020. why not blowing hot air? First, check the coolant level when the engine is cold. Post Reply. 0. Stupid, I know. 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. 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 Submit Your Questio... Lexus RX350 heater ... Notifications Clear all Lexus RX350 heater intermittently blowing out cold air Last Post RSS. sensor in the vent checks the temperature and tries to set the amount of air … We took it back to the shop and they noted that the compressor was shutting off for some reason. Potential causes. Another possibility is that a door or diverter that is supposed to direct warm air into the interior is stuck, preventing proper airflow. Heater intermittently blowing cold air. A fan blows over your heater core and directs warm air into the cabin. Gear-obsessed editors choose every product we review. HEATER BLOW COLDIn this video we will explain the reasons why your car heater might blow cold air. Check the coolant level. No other warning lights are active on the display. Thermostat is $600. 11. If the fan has broken, then there certainly won’t be any warm air from the heater core coming your way. Greetings; The wife's 2008 RX350 is having intermittent issues with the heater. When I slow down to make a turn sometimes it will blow cold and at times it will not. The coolant absorbs the heat from the engine, causing it to become hot. jeepmopar76, … 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. Radiator fluids are topped off where they should be. A fan blows over your heater core and directs warm air into the cabin. The blower stopped working without any warning, such as hearing a noise or working intermittently. Why is my car heater blowing cold air? If the holdup is by the heater core, then that’s one reason why hot air isn’t blowing. The passenger side of the car is getting no/some heat. 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). Reasons Why Your Car Heater Isn’t Blowing Hot Air. CSI: Car Smell Investigation, 2020 Hyundai Palisade Edition, Tips for Starting Your Car in Subzero Weather. If the car does get up to temperature as it should, there’s probably something else that has gone bad. The ventilation fans blow air over the matrix and into the car. Answered in 20 minutes by: 10/7/2011. A few weeks after that the ac would intermittently start blowing warm air. 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. My friend thinks I am a car-god. Car Questions. 08/12/2020 7:40 pm. 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 Wondering if possibly connected to air condition issue. When your car A/C blows cold then warm, head to your nearest Firestone Complete Auto Care. Recently my heater has only been working intermittently. No heat. Thermostats are a common wear item, and typically break open, so it’s always allowing coolant to flow through the engine. Schedule an appointment online or stop by your nearest location today! Access them anywhere. The morning was cool and I was quite irked that it wasn't working and figured I must have blown a fuse. hvac My 08 Milan has started to blow cold air when heat is needed. One of the more obvious problems would involve the blower fan not pushing any air out of the vents. Log In. 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. 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. melinda on December 04, 2015: My truck is a 2011 chevy colordo and the heat or a/c will work. Show More. It's no fun getting into your car on a frosty winter's morning only to find the car heater not blowing hot air. Also, when it is running cold, the air intake sound gets kinda loud. , an engine typically takes about 5-10 minutes to reach its proper temperature and! Coolant leading from radiator and to replace it including hoses is $ 580 11,050. In line with cars.com ’ s one reason why hot air 's car heater blowing cold air intermittently air... Cause plenty of other issues, but there won ’ t blowing hot air until I start 1! 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