Jan 18, 2015 at 12:15 PM #1 #1. Compromised flame sensor. Coolant is low . The core, a type of heat exchanger, gets its heat from liquid engine coolant that circulates through it by means of heater hoses. The coolant absorbs the heat from the engine, causing it to become hot. 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. Any suggestions? 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. It's almost as unpleasant to have a heater that's not giving out enough heat. October 12, 2020. Related: Tips for Starting Your Car in Subzero Weather. A condenser’s job in a vehicle is to cool the warm refrigerant that was used to make the air cold in the evaporator. The ventilation fans blow air over the matrix and into the car. 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. Last couple months a couple times I had heat on and noticed cool air blowing out. We may earn commission if you buy from a link. 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. Category: Chrysler. However when I put my foot into it I will start to get heat again. A fan blows over your heater core and directs warm air into the cabin. When it's really cold out, the heater blows air that is barely warm. When driving, an engine typically takes about 5-10 minutes to reach its proper temperature. News & Events. It’s not always easy to diagnose heater problems. However, if I fiddle around with the temperature control I can get the vents on the passenger’s side to blow warm air. Why is my car heater blowing cold air? WHY MY CAR HEATER DOES NOT BLOW HOT WARM AIR. 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. melinda on December 04, 2015: My truck is a 2011 chevy colordo and the heat or a/c will work. Schedule an appointment online or stop by your nearest location today! The temp. HEATER BLOW COLDIn this video we will explain the reasons why your car heater might blow cold air. 0. To help engines warm up fast and then keep it at a steady temperature, manufacturers use a thermostat to control the flow of coolant. Air driven by the blower picks up the heat on its way into the passenger compartment. 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 Discussion in '2nd Gen. Tacomas (2005-2015)' started by JHinman06, Jan 18, 2015. Now that it's winter and -17 degrees this morn, my 07 Charger R/T 5.7L AWD is having cabin air heat problem. 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. electrical So what happens if your car heater zonks out in mid-January? We have had bigger issues to deal with lately with intermittent stalling on the interstate. Driving. 11. November 16, 2020. If the holdup is by the heater core, then that’s one reason why hot air isn’t blowing. My friend thinks I am a car-god. Checking to make sure the engine warms up properly is number one on the list. Generally, I get no more hot air for the rest of that drive. 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. Stupid, I know. 3. Show Less. 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