Q: Do I need to change my thermostat?

asked by on

My temperature gauge sporadically jumps from HOT to COOL. It jumps to HEAT and then all the way down to COOL and then steam comes from under hood while it's on COOL. This didn't happen until I changed to cooling fan clutch. I was thinking that it may be a bad thermostat, water pump, or maybe the radiator pipes are loose.

My car has 182000 miles.
My car has an automatic transmission.

Hi There, It sounds like you may have a faulty thermostat. The thermostat regulates the flow of the coolant in your car’s engine and controls when the coolant flows in and out of the motor from the radiator by opening and closing at specific temperatures. When your thermostat is not working properly or is stuck closed, this will not allow the coolant to properly circulate through the engine, which may cause the engine temperature to fluctuate erratically or in some cases just remain hot. When the thermostat is stuck open it can cause the coolant to circulate constantly resulting in the motor never reaching the correct operating temperature.

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. Do I need to change my thermostat?

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: Steering wheel bolt loose.

The vehicle shows it has a recall from the manufacturer for the tie rod ends coming loose or failing and driver may loose control. The recall number is 06V155000. My recommendation is to not drive the vehicle and contact your...

Q: I have a 2007 Suzuki forenza and it all of a sudden started cutting off after being on about 8mins or so cranks right back up but

Hello. Thank you for writing in. The vehicle warms up after 8 minutes, and you may be having an issue with one of the temperature sensors. Start by having the vehicle scanned for codes, and use them to help point...

Q: Q: Code P0128

The code has to do with the thermostat not performing as specified, or the temperature sensor is not working correctly. You could first replace the thermostat, since it is the most common cause, and see if the code returns. If...

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...
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.