2001 Pontiac Grand Prix Q&A
2001 Pontiac Grand Prix Question: No Heat
Customer Concern: No heat, both heater core hoses hot. Manual Heater Vent Air Conditioning (HVAC) system. Tests/Procedures: 1. Test voltage backprobed at the temperature door actuator Brown wire ignition power, Yellow wire ground, Dark Blue wire control 0-12 volts. If there is a Light Blue wire it is not used. 2. Test terminal contact. 3. Remove temperature door actuator. Test for stuck temperature door. 4. Replace temperature door actuator. Tech Tips: Temperature door actuator is located behind right side of dash behind and left of blower motor housing on end of the HVAC housing. - PARTS GUY
Bad thermostat. - Camster
turn on heater and it blows cool air. no leaks or smells
would the blend door before the heater core cause the same problem as a plugged heater core if the door was not working right?
yesturday my heater just quit blowing out hot air,would it be the thermastat?its like the air conditioner is on,or would it be something else?the car isnt over heating???????? thanks!!!!
My car started running hot about three weeks ago. Heater would work on and off. Checked water and had oil in it. Replaced intake and head gaskets. Flushed Radiator. Ran fine for day or two. Started...