Q: My car is overheating. I have to run the heater to keep the temperature gauge on the half mark.

asked by on

My car overheats when its running. If my car is idling it doesn't overheat. To keep the car cooled down I have to run my heater all the way all the time. I've never seen steam or heard noises coming from the engine. I also don't have any air conditioning when I run the a.c.

My car has 185765 miles.
My car has an automatic transmission.

Hi - there are a couple of possibilities for your overheating situation. The thermostat may not be opening properly, preventing hot water from circulating to and cooling in the radiator. The water pump may be failing and can’t circulate enough hot water through the radiator. If the head gasket on the engine has failed, combustion gases from one or more cylinders "superheat" engine coolant very quickly.

If the coolant level is low, and there are air pockets in the engine, the coolant is literally "boiled away" inside the engine, creating far higher temperatures than a "full of coolant" engine. I would recommend having your car inspected by a mobile, professional mechanic, such as one from YourMechanic, to determine why the car is overheating.

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
  1. Home
  2. Questions
  3. My car is overheating. I have to run the heater to keep the temperature gauge on the half mark.

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: Oxygen sensor

Hi There, Your vehicle has a couple of oxygen sensors, one which is placed before the catalytic converter and one that is after the catalytic converter. The purpose of this is to test the oxygen content of the exhaust gases...

Q: Why doesn't my transmission shift into second gear?

Hi there. A car that will not shift from low to a higher gear is caused either by a damaged shift solenoid, low transmission fluid or internal damage inside the transmission. It would be best to have a professional mechanic...

Q: What is causing temp to go up and seems like car doesn't have usual power.

This can be caused by a number of factors such as low coolant levels, a faulty thermostat, or a failing coolant fan switch. As you may know the coolant fan switch helps to maintain the proper coolant temperature by turning...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.