At Fixya.com, our trusted experts are meticulously vetted and possess extensive experience in their respective fields. Backed by a community of knowledgeable professionals, our platform ensures that the solutions provided are thoroughly researched and validated.
Our 2001 PT temperature gague has been fluctuating from cold to very hot. It goes down when the heat is put to full inside. Water pump was replaced in 2007. Radiator has also been replaced. Coolant was at the correct level. Could this be the thermostate?
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
The heater core may be plugged with rust. Good way to test it is with the engine warmed up put the controls in heat mode and then go under the hood and locate both water hoses going t the heater core. Hold on to both hoses to see if the temperature of both hoses are the same. If not, no water is getting into the core. . If the temp is the same, then control vacuum is not working. There is a check valve in the line to the control head that prevents vacuum fluctuations from moving the blend door when accelerating. Check it.
Disconnect the temperature sending unit wire connector for the gague ( not the one for the computer ) with the key on. The temp hand should stay on cold mark. Next, ground the wire and the temp hand should go to full hot indicating the gague and wiring to it are ok. If ok suspect a faulty temp sending sensor if the cooling system is full and properly bled
Is the coolant level full? Sounds like air pockets, as a temperature sensor can't read air temperature. If it looks good, you might have a circulation problem, due to plugged radiator, or heater core, or possibly a worn out water pump. You can also "feel" around the thermostat to see if it's opening properly.
check your coolant level, its may be low causing the fluctuatiion also the loss of heat. if its ok replace your thermostat its not regulating tempature right
First of all you have a bad heater core that needs to be replaced. Second you may have a bad temperature sensor. Make sure the radiator if full of water
×