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pontiac grand am heater

danadoo94's Avatar
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02-26-05, 10:26 AM   #1  
pontiac grand am heater

i have a 93 grand am and the heater doesn't work, it is not the core. I can't figure out what else it could be. the knob for the hot/cold &ac/defrost works, but only cold air comes out. It did work when i bought the car a fewyears ago. Any ideas?

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alabbadessa's Avatar

Join Date: Oct 2004
Posts: 20

02-27-05, 05:41 AM   #2  
make sure the blend door is closing just because the knob works it does'nt
mean the blend door is working.
if the door is working i would start first at looking at operating temp of vehicle
check upper hose and lower hose to see if they are getting hot if so when was last time you had thermostat changed, i would also check your heater control valve which regulates the heat to the inside of your vehicle
good luck

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