Questions & Answers for: Pontiac door heater

door is open. heater still won't heat Where the rubber hose goes into the heater, there should be an air switch that opens an closes a shut off to the heater coil try it manual it should open an close

...and it works. this problem is most commonly caused by either a sticky air temp control blend door or a defective blend door electric actuator, this door controls the air temp at the heater/AC

...questions leave them in add comments and I will check back. KL Turn on the headlights, and radio to 109.7, then open the heater door and shove a pice of wood on the fire, it should warm up

...heatercore last summer cause heatercore leaks, or the blend door is not moving in heater housing , or the heater switch is broken or not moving the actuator at motor on blend door in heater

...out the heater core with air as well If the heater hoses are getting hot, the problem may be a faulty blend door under the dash.  The blend doors direct air thru the heater core and the

...door that blends heated and cooled air from the AC and the heater core, this is called (interestedly enough) the air temperature control blend door actuator. The motor that moves this door fails ...

...heater blows cold, turn off engine and restart and then heat works great even driving down highway or idling. what is happening when key is cycled to make heat work? Servo? actuator on blend door? ...

...door actuator and other heater case doors will be either vacuum operated with a few canister diaphragms situated around the heater case, or they may be operated with electric motors. If you pull off ...

...the actuator that drives the door for the heater core or cable? make sure both water lines going to the heater core are getting hot, if only one is the mix door is not working properly It the ...

...door on the heater/air conditioning assembly under and inside the dash. The mixer door has a tendency to tear up the fiberglass assembly that holds the door. If it is not the core or the mix door ... ...