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Heater not heating

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bluegirl

New member
Heater not heating. Blower works but no heat. 2006 grandprix GT with supercharged engine. Just had oil change and checkup for "check engine light" with nothing showing in codes. Where to start?
Tx
 


Check to make sure its full of coolant and if it is start with changing the thermostat since that's a cake easy job to do and its like a 3 dollar part and see if that fixes the issue. Thermostats stick and the cooling doesn't go open loop and the thing wont blow hot air. Ive changed plenty of thermostats just because the car only had warm air in the winter. It usually works especially if it blows but the air is cool.
 
Checking the coolant is easy, but I am not sure where the thermostat is located. I imagine it isn't hard to change out either.
 
where the top radiator hose goes into the lower intake is where the thermostat is. There is 2 10mm bolts I think holding it down and has a bleeder screw on top of it. If your standing at the front bumper looking at the engine bay its on the drivers side of the engine in front of the throttle body.
 
bluegirl said:
Heater not heating. Blower works but no heat. 2006 grandprix GT with supercharged engine. Just had oil change and checkup for "check engine light" with nothing showing in codes. Where to start?
Tx
Click to expand...


pop the hood with the engine up to operating temps, theres 2 hoses off the alt bracket to the fire wall, carefully touch them both, if they are both hot, thats good, if one is warm the other cold your heater core has air in it.

take those 2 hoses off the alt bracket, put a garden hose to one hose and flush it till a steady stream of water comes out the other hose, then put it back on.

if both hose's are hot like they should be, the blend door actuators could both be bad. http://www.grandprixforums.net/showthread.php?t=21941&highlight=blend+door+actuators
 


Did replacing the T-stat fix your problem? I also have the same issue with my wife's 2007 GP. It's been blowing "luke-warm" air for a week or two. Wondering if it's the same problem?
 
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