Q: Q: Running hot

asked by on

I just had the thermostat and radiator changed out. I put the correct fluid inside. As I take off, it starts running hot. It really start running hot when I press the button for AC or heat

My car has 204469 miles.

Overheating can also be caused by a failing coolant fan switch. As you may know the coolant fan switch helps to maintain the proper coolant temperature by turning on and off at specific temperature thresholds. When this switch is not working properly, this can cause the fans to come on intermittently, all the time or sometimes not at all. When this happens you will notice a temperature spike and drop occasionally as the fan comes on and off. I would suggest having an expert from Your Mechanic come to your home to diagnose your cooling system.

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. Q: Running hot

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: Just got tune up now water wont stay in reservoir and its hesistant...

Hello, and thank you for writing in. If the coolant in the overflow tank is being removed from the tank, then the cooling system is leaking. The smoke you are seeing is likely white and caused from the coolant either...

Q: My 2012 Chrysler 300 won't run it says it's in drive like it's running but it's not and it won't turn off.

This may be a result of low transmission fluid or potentially a faulty transmission control module. A faulty transmission control module may cause a delay in acceleration or erratic shifting of gears. The transmission control module has various sensors such...

Q: My car runs hot but it never overtheats the temperature gauge moves up and down

When you are driving on the highway above 45 mph your engine cooling fan does not provide any flow and the car relies on the force of moving air from the speed. The fan can still come on if needed...

Related articles

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...