Q: Q: Heater

asked by on

The.heater only runs on cold an the person who had it last said that there some type of switch under the dash but I'm not sure where it is
My car has an automatic transmission.

The heater uses hot engine coolant to warm the vehicle cabin. If the heater is blowing cold, the first thing to check is the coolant level. Low coolant, or a problem somewhere in the cooling system, will affect heater operation. Other potential causes include a thermostat that is stuck open (not allowing the engine to reach operating temperature), air in the cooling system or a bad heater core. I recommend having a professional, such as one from YourMechanic, diagnose and repair this heating problem for you.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Q: Heater broken

Hi. When a heater core fails, it usually fails by leaking coolant into the passenger compartment in the vehicle. If your problem is that hot air is not being blown out of your vents, you could have several other issues....

Q: Car gets jerky when first accelerating

Although I would need a bit more information for a specific diagnosis, there are a few things that can make the vehicle feel jerky: Broken or worn engine and transmission mounts allow too much movement under the hood. While...

Q: Doesn't start. 1999 Ford Ranger

You need to check the fuel inertia switch in the right passenger kick panel to make sure it is not tripped. If not tripped, then check that the pink wire in and out has power when you crank the engine....

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...