Recommended portable car heaters and productsīased on the recommendation of other car enthusiasts I made this list on Amazon for you to view.One of the most common (and inconvenient) problems with the Chevy Equinox is when it has no heat coming from the heater. You should remember that a poorly functioning heater, in any case, indicates a problem in the engine cooling system, and driving a car with these problems can lead to bigger problems and costly repairs in the future, so it’s safe to inspect the problem as soon as possible to avoid bigger issues. Next, you need to check the water pump, thermostat, heater’s radiator, heater tap, and the presence of air in the cooling system. If the car’s heater is blowing cold air at idle, you should first check the coolant level, and its condition, completing the coolant level is the easiest way but not always the best way to fix this issue. When using more water than the coolant, rust will form which jams the tap. This type of heater is present, in most cases, on older cars and the simplest solution is to open the tap. If the heater has a tap for supplying coolant to the radiator, then this is closed or jammed because of rust. The presence of air in the cooling system can be due to improper replacement of the coolant, depressurization of individual pipes or their connection point, malfunction of the air valve, problems in the pump operation, or because of a damaged cylinder head gasket.Īir in the cooling system impedes the circulation of coolant in the system, and as a result, the heater blows hot air only when driving, and cold air at idle. If there is such information, you can check it yourself. Otherwise, it is better to seek help from a car workshop. Problems can be associated with improper configuration of a particular system, or with software or hardware problems of climate control.Ĭhecking its operation depends on the specific car make and model and the type of system. These steps are usually described in the car manual. Problems with the climate control systemĮspecially on newer car models, this system can sometimes have software issues, which leads to cold air blown by the car’s heater at idle. If the coolant is initially circulated in the “big circle” in a cold engine, it will only be able to warm up after a long time of driving the car, or you will need to spend a lot of time warming up when the engine is idling. When the thermostat rod is jammed in the open position this can mean cold air is blown when the engine is idling. Usually, cleaning the heater’s radiator has a positive effect on the efficiency of the heater, including at idle speed. You can try cleaning the radiator and check if a crack has not been created where the liquid can come out or air can enter. The heater’s radiator clogs over time making it harder for the coolant to pass through its bearings, leading to slightly warm air or completely cold air blown at idle. If the pump is responsible, then it needs to be changed to a new one. ![]() This part is responsible for the circulation of coolant through the cooling system, and when the rotor is not able to create sufficient flow, the heater blows cold air when the car is idling, and when the car is moving it may be slightly warmer. If the coolant has not been changed for a long time and/or is in poor condition, then it is better to replace it with a new one, the same brand, or with one that your engine needs, so it’s better to check the car manual. You should not neglect this symptom because things can get serious and harmful to your engine. Also, if you see that coolant drops constantly without any signs of liquid leaks, check the radiator cap or the expansion tank cap. The low coolant level in the expansion tankĪ low coolant level in the tank represents the main reason why you don’t have hot air in the cabin, it is not just related to when the engine is idling, however, this can be the reason why your heater blows cold air at idle.Ĭompleting the coolant level with the same type of coolant represents an easy and quick fix. There are five main causes why the heater is cold at idle. ![]() Recommended portable car heaters and productsĥ reasons why the car’s heater blows cold air when the engine is idling.5 reasons why the car’s heater blows cold air when the engine is idling.
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