Heater in car doesn t work

Most cars on the road still have. Checking your car heater regularly can prevent you from needing auto heater repair in winter. But if your car heater starts blowing cold air and suddenly stops working in the middle of winter, it can make it downright miserable.

When troubleshooting to try and repair the car heater , check the coolant ONLY when the engine is cold. Step - Inspect heater system vacuum lines especially to the .

The heater control valve is underneath your hood and acts as the switch that turns the heat on and off.

If that piece is not working right, your car could .

If the lamp lights, the switch is broken. Then probe the switch input terminal. Probe the fuse output terminal with the lamp. Sign of trouble: If your truck typically overheats when you drive it.

What to do: Consult your manual about how to replace the thermostat. Since the heater and air conditioner are so closely relate to the . Some mechanics might offer the option of just bypassing the heater core. There are other ways to work around the problem, too.

Turns out that the heater core is ba but it will take something like nine or hours just to replace it . It could also be something simple like the valve that turns on the flow of hot coolant into the heater core is stuck, or the linkage between the switch on your dashboard and the valve itself may be broken. Turn the key to the on position and turn on the fan and it will be on low no matter what setting it is turned to.

Turn the car off and try again sometimes the fan will turn on but will be at medium or High. The weather is cold and of course your heater is not working properly. Determining the cause of the problem can be time consuming and frustrating. When your car does not warm up with the heater on, the thermostat may be stuck or the coolant may be low.

What is wrong with my car heater ? First it is important to understand how heaters in our automobiles work.

In car heaters there is not an electric element. Instea you have what is called a “ heater core. The blower is what circulates the heat through the core and then warms the car and passengers.