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Re: Damper is stuck in closed position for heat/AC. How...
I belive this year has the electric actuator thatcontrols the blend door, you will ned to unbolt it and turn door then reinstall actuator to hold door in that postion, this is located on heaterbox.
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sounds like your blend door is stuck in the middle of the operating range. this door directs air either fully or partially over the heater core or ac evaporator. when stuck in the middle u will alwaysd get a blend of both
try to tap on the blower motor with the switch in the on position the motor is located on the passenger side close to the firewall if it kicks on you need a new blower motor
You should be able to open it with a large screw driver. Simply put the screw driver in the hole where the latch would go and pull the handle to open the door. With the handle in the open position pull the screw driver toward the inside of the van and the latch should open right up. Then close the door. Hope this helps.
SOUNDS LIKE THE AC CONTROL HAS LOST VACUUM FROM THE ENGINE, YOU MAY HAVE KNOCKED A HOSE OFF WHILE CHANGING THE FAN CLUTCH, IS THE AIR COMING OUT THE DEFROST VENTS BY CHANCE?
Yes, in high it bypasses the resistor and uses a high blower relay. But I think on 1998 Astro the High relay and the resistor are built together. It should be mounted in the blower box real close to the blower motor.
Check the battery contacts for tightness and deposition. Make sure polarity is fine.
Also check the ignition switch
Let me know if you need more info
Good Luck
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