If that’s the case, then the air bubbles have to be flushed out to fix the problem. And you wait — and wait — but the heater just blows cold air. Are Cars Designed to Fail At A Certain Point? Here's Why, and What to Do About It . Your email address will not be published. These parts could vary from car to car, depending on the make and model. If the furnace is cold, it cannot heat the air being propelled outside. Until the engine warms up, there’s no heat for the heater core to extract. If your heater was blowing lukewarm instead of cold, a thermostat that was stuck open would have been a potential cause. A car heater blowing cold air could be a symptom of the failure of the heating unit.. How To Reset Check Engine Light: Follow These 4 Easy Ways! The heating system in your car is supposed to keep the atmosphere warm. Symptoms of a Bad Variable Valve Timing Solenoid and How to Replace, 4 Different Types of Burning Smell From Car: Main Causes and Solutions, How To Replace A Rear Main Seal Without Removing The Transmission, Iwamotocho 3-10-7-7F, Chiyoda, Tokyo, Japan 101-0032. When the heater blows slightly warm instead of cold air, a thermostat with stuck open valves is to be blamed for. But countless drivers have found themselves wondering, “Why is my car heater blowing cold air?” This inconvenience tends to result from problems with your coolant or blower motor, but it may be difficult to tell just what needs to be done without a visit to the shop. Why is my heater blowing cold air - Answered by a verified Auto Mechanic We use cookies to give you the best possible experience on our website. A bend door can malfunction for a number of reasons. If it isn’t, then flushing the heater core will often fix the problem. This is the reason that it takes a while for heaters to start blowing warm air. Over time, many unwanted things caused by corrosion and wearing can pile up inside the tubes and block their regular flow. And if they fail to open at that point, then coolant won’t circulate properly, the engine may overheat, and you might experience a problem where the heater blows cold. Well this happens sometimes and a few things can be the cause. Driving a Toyota Land Cruiser: Why Is It Appealing? it tries to start but acts like it isnt getting gas. Thermostat seems fine, car stays at constant 210 even when running for 30 minutes. Since the heater core is often the high point in a cooling system, air can move into it and become trapped. White Smoke From Exhaust: Main Causes and How to Fix, Take Advantage Of These Ten Easiest Cars To Work On. When a thermostat gets stuck to the ‘open’ position, the engine takes a much longer time to warm up. These Could be the Reasons, 11 Signs Your Car Is NOT Shifting Correctly, Things To Avoid While Driving An Automatic, Best Tire Pressure Monitoring System Reviews. In order to allow the engine to warm up, they stay closed until the coolant in the engine reaches a given temperature range. Universal Replacement Car Heaters That Work, Finding a Cheap Fix for a Broken Defroster, Using a Space Heater as an Electric Car Heater, The 10 Best Portable Electric Car Heaters of 2021, How to Fix Sweet, Mildewy, and Burning Smells From Your Car Heater, Car Engine Block Heater: Unsung Hero of the Frozen North. It’s also the reason that a plugged heater core, stuck thermostat, or air in the cooling system can all cause a car’s heater to blow cold. Something is wrong when that does not happen. The car is running hot but the heater blows cold air.I changed the t thermostat but that didn't solve the problem. February 12, 2019. The Best TOAD Vehicles for Frequent Campers. Why Is the Heat Not Working in My Ford F-150? The heater core that resembles a compact radiator is the high point in a cooling system. It could be due to a detached vacuum line, a breach in a mechanical linkage, or a bad switch. There are four main cooling system problems that can cause a heater to blow cold: It’s a little more complicated than that in practice, but these are the most common heater issues that you’ll run into. Tsukasa’s blog is one of the best resources for information about keeping your favorite imported car running smoothly. Lack of heat in the passenger compartment is not just an uncomfortable drive, it … Finally, a heater core can become plugged in more than one way. Of course, you get cold air when the bend door is fixed to the ‘close’ position. When it gets jammed, the heater will be blowing cold air. The valves help with warming up the engine by remaining closed until the engine coolant reaches a certain temperature level. There are a number of different underlying causes that can lead to these situations where a car heater suddenly stops working, but you’re typically going to be dealing with either one or the other. Get shopping advice from experts, friends and the community! Moreover, because of being passionate to learn about the recent happenings in auto industry, he doesn’t only provide great car maintenance tips, he also always updates latest trends in among car brands and share them in his own interesting viewpoint. To do About it car from Japan air do not go through their designated paths is Shift Lock Release How... And its Owners reaches a certain temperature level certain temperature level into it and become trapped his sharing posts not. Heater to blow cold air could be a symptom of the air does not circulate properly the. But the heater core is often the high point in a car heater not blowing hot air the! It can not heat the air bubbles run right through it and get trapped to! 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