After 10-15 minutes, the heat often peters out and I am getting cold to lukewarm air. While your situation the problem is cold air, it may be how this system gets stuck in your car. So what happens if your car heater zonks out in mid-January? This coolant is then routed through a “mini” radiator called a heater core. It’s not always easy to diagnose heater problems. Your Check-Engine Light Is On — How Much Are Repairs Gonna Cost Ya? These time increments can vary in every case, of course, but basically it means that the cold air comes and goes. Why is my car heater blowing cold air?’s Editorial department is your source for automotive news and reviews. 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. 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. JHinman06 [OP] New Member. If you're having trouble getting the ice off your car, this will help things along. 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. And it doesn't matter if its in dual mode or if the temps are separate. 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 . These instructions will help you diagnose and fix a car heating system that only blows cold air. Hello, I've searched around on this forum, and another forum, but didn't find exactly … However when I put my foot into it I will start to get heat again. I did this procedure and it worked! Checking to make sure the engine warms up properly is number one on the list. We have had bigger issues to deal with lately with intermittent stalling on the interstate. (A clogged heater core can prevent hot air from blowing without causing other problems.) Heater valve is jammed/faulty . Once it’s reached the proper temperature, a valve in the thermostat opens and allows coolant to flow through the engine. Many different things can go wrong here causing the whole system to work poorly or not at all. 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. Customer Question. Jan 18, 2015 at 12:15 PM #1 #1. I play with the thermostat, blend door functions etc. You may be able to find more information about this and similar content at, How to Clean Your Gross, Gunk-Filled AirPods, How to Zip, Unzip, and Encrypt Your Files. News & Events. 2. 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. 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. We have a 2010 honda Odyssey and we are experiencing some air conditioning problems. Fixing this can be as simple as a fluid flush. In many cases this type of problem can be caused by a faulty HVAC control head or intermittent blend door actuator or low coolant. The first time I noticed, the heat dial was always in the red. Another possibility is that a door or diverter that is supposed to direct warm air into the interior is stuck, preventing proper airflow. 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. A fan blows over your heater core and directs warm air into the cabin. The ac went out on us about 6 months ago so we had the compressor replaced. 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. The heater in my car is intermittent. If your furnace starts blowing warm but then quickly turns cold, the flame sensor may need attention. Potential causes. A car’s cabin will heat up as the engine’s coolant heats up. 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. Submitted: 9 years ago. Have an '05 HL (non-limited) and we were running the heat at the low fan speed setting the other day. The passenger side of the car is getting no/some heat. Sometimes it blows out hot air and sometimes it is cold air. Sometimes it’s both hoses, other times the hose going in is hot but the other hose is cool. The taillights go out when the brakes are applied. Anyone have this happen? My car … 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. Category: Chrysler. Meanwhile both passenger’s side vents are blowing cool air. Recently my heater has only been working intermittently. Discussion Starter • #1 • Dec 6, 2013 (Edited) Help! The coolant return heater hose should be slightly cooler than the coolant supply heater hose. One of the more obvious problems would involve the blower fan not pushing any air out of the vents. The driver’s side is blowing almost uncomfortably hot air. 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. Sometimes it will leak water on the front passenter side under the console … read more Show Less. Gear-obsessed editors choose every product we review. Joined: Jan 18, 2015 Member: #146633 Messages: 4 Gender: Male Versailles, KY Vehicle: 06 Reg Cab 4 Cyl. 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. In the latter case, there’s a good chance your engine will be running hot and be in danger of overheating. 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 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. 11. While idling, the heater blows but doesn't produce hot air. It might blow comfortable cold air for 30 minutes and then go back to blowing warmer air. Intermittently blew cold/normal. My car has 49000 miles. No other warning lights are active on the display.

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