Rear climate controls quit working as well as the DVD player, all fuses are good for HVAC system front and rear. The rear fan control on front works but no heat in rear when on. Just blows cold air. No control from rear controls
Is your heater blower motor working on all speeds ? Are you get any air coming from the rear vents ?
SOURCE: no rear heat in pontiac montana '99
Warm up vehicle, then access heater pipes that run to rear of vehicle. they should be HOT. if not you have a circulation issue. IF they are hot, then the blend door is not in the correct position. this door directs air across a hot or cold core to create the correct air temp. check and update me.
SOURCE: 2005 PONTIAC mONTANA-NO HEAT
Had the same problem with 03 Montana and it was the actuator assemble. It controls the hot and cold air and controls all of the other functions....defrost, floor etc...
SOURCE: 2002 Pontiac Montana, No Heat, I put the temp control on
the cabel from the heat dial to the heater box behind the dash could be snaped or jamed thus not opperating the lever which operates the flap which open and closes the heat box next to the matrix. or if your coolant is brown in colour it could be your matrix is clogged with sedament and needs flushing out. or it could be your water pump not pumping coolant round your engine or it could be a knackerd thermostat i hope these will help you id start with the easyest first thermostat
SOURCE: I have a 2000 pontiac
I have a 2000 pontiac grand prix with a digital climate control system. The heat quit working, it doesn't blow out any heat. Now that it is warm outside the air stopped blowing out any air. The digital temperature on the climate control is not correct. When it states that it is below 30 degrees on the ext and it is warm outside the air wont be cold. Once it starts going above 30 degrees the air gets colder. Today the blower stop working all together. Was told it maybe the climate control unit was bad. You can hear the door opening/shutting when you switch the temp from cold to hot. But there was no heat blowing out whatsoever in the winter time. Could you please give me your opinion on whether or not it is the climate control unit or something else?
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