Why does air come out when AC is off?
AC simply means the compressor, the bit that sucks your fuel by creating extra load on the engine, if you turn off the AC it simply turns off the compressor, the fan can still run if you want it to and you can turn on the heater, just on the coldest setting with no AC on it is simply a vent, this blows air from outside …
Why is my car fan always on?
It is possible that this problem of your car’s fans constantly running is some sort of mechanical or electrical error from a poor sensor or other component. There are temperature sensors and some cars have separate sensors for the gauge itself. The fan can be shut off when the engine temperature warrants.
Why does my car fan keep running after I Turn Off the engine?
Running cooling fans help cool down the engine even after you turn off the car. Common Causes. If your cooling fan runs for over 10 minutes after turning off the engine, you may have a problem that needs to be fixed. Here are some possibilities causing the fan to stay running longer. low coolant level, faulty coolant temperature sensor,
Why does my car have no air in the vents?
Step 3 – A fan blower motor is controlled by either a switch in the passenger compartment or by a computer. If this fan motor is starting to fail it will cause the fan motor to run at a lower speed resulting in low air flow. To test this condition an amp meter is needed, connect the meter lead to the power wire of the fan motor.
How does a car air conditioner fan work?
The fan can be adjusted to run at different speeds, according to need. In a heater worked by a water valve, all the air goes through the matrix. The matrix temperature is controlled by regulating the amount of hot water going through it.
How does a car heating and ventilation system work?
The heater. Incoming air goes through the water-heated matrix and is warmed. There is also an electric fan, which can be switched on to blow air through the system when the car is stationary, or when extra ventilation is called for. The fan can be adjusted to run at different speeds, according to need.
Can a car fan still run after the engine is turned off?
Then you notice the engine cooling fan is still running even though the car is turned off. It is ok for the engine cooling fan to keep running for a few minutes after turning off the car. Your car fan will run for a few minutes after you turn off the car then turn off. This is normal in many vehicles, such as BMW or Mercedes-Benz.
Why does the radiator fan run all the time?
The radiator fan may run up to five minutes and sometimes longer. Unless there is an electrical issue, it may stay on all the time until it drains the battery. When the engine is running, the coolant circulates from the engine and flows to the radiator, where heat is dissipated.
Why does my AC fan keep running when the thermostat is off?
Usually when the relay switch is broken, the fan will continue to run by itself. This happens because there’s no communication between the thermostat and the blower fan. Now, if it’s a short circuit, both the ‘on’ and ‘off’ commands you enter typically won’t get sent to the blower fan.
Why is my Buick LaCrosse fan still running?
(In fact engine heat can increase when you first shut them off since water pump is no longer circulating coolant, as hot coolant expands from the heads and into the radiator, the cooling fans need to run to bring that temp down. 15 people found this helpful. I have a 2015 Buick Encore.