Q: Q: Thermostat not working

asked by on

My temperature indicator in the IP suddenly quit working. It went from normal to zero. Then in nothing flat the display on my IP read “engine too hot A/C off.” This will even happen in the morning after the engine has been off for approximately 10 hours. After the car is warming up from driving the thermostat comes back to life and works fine. I took it to the dealer and they changed the solenoid. It helped for a while but the problem came back after a couple of weeks. Do you have any ideas about what could be wrong?

Greetings! I’m inclined to think that the problem will be with the coolant temperature sensor. Have a technician test the coolant temperature sensor and inspect its electrical circuit.

I’d recommend getting some help from a certified technician. They will have access to the factory resistance and output specifications of the sensor. If the technicians readings are out of specification then the coolant temperature sensor will be replaced.

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: Thermostat not working

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: 2002 Pontiac Grand Am GT security light on constantly and the car will only start after battery is run down and jumped.

Hello, thank you for writing in. You should start by scanning the vehicle for diagnostic codes to see what the security light is trying to tell you. Do this after you can get it to start and can take it...

Q: Motor on frame

If the "original" engine/transmission assembly was NOT interfering with the frame, and yet the replacement does, that means one of two things (or both) has occured: 1) the mounting bosses on the replacement block are in a different position than...

Q: Q: Overheating and heater not working

It sounds like you may have a faulty thermostat as well as a bad coolant temperature sensor. If the coolant is not getting to the heater core, then this would indicate a bad thermostat or a clogged heater core not...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.