TURN ON THE HEATER THE TEMPERATURE STARTS TO GO UP?

2000 Pontiac Grand Prix

Tiny

biglu

March, 6, 2012 AT 2:16 PM

I have changed the thermostat and heating sensor on my 2000 3.1 gran prix. Both hoses are hot when I have the car running. I turn on the AC and the fan comes on, but when I turn on the heater the temperature starts to go up.

changed thermostat, heating sensor and replaced the antifreeze. AC works but when I turn on the heater it starts to overheat. AC fan turns on and both hoses are hot.

3 Answers

Tiny

ASEMaster6371

March, 6, 2012 AT 3:29 PM

The radiator may be clogged.
Did it overheat prior to this repair? If it did, get a leak down test to verify the head gaskets are ok.

Roy

Tiny

biglu

March, 6, 2012 AT 10:44 PM

How can I check the radiator?

Tiny

ASEMaster6371

March, 6, 2012 AT 11:24 PM

You can do a temp check from one side to the other but I reccomend you take it to a radiator shop and they will remove it and acid flush it out.

Roy

Please login or register to post a reply.

Heater Hose Replacement Chevrolet Camaro
Replace Heater Core
Cabin Air Filter Replacement Honda Civic