blend door diagnosis
Thread Starter
Cruising
Joined: Oct 2017
Posts: 13
Likes: 0
From: California Maryland
blend door diagnosis
blend door questions.
ok so I've watched the door. when the ac is on it holds tightly to the cold positions. but when I move to heat it starts to move that way bt then stops and just kind of bumps or waves back and forth. does this sound like the motor is the problem?
ok so I've watched the door. when the ac is on it holds tightly to the cold positions. but when I move to heat it starts to move that way bt then stops and just kind of bumps or waves back and forth. does this sound like the motor is the problem?
Last edited by Tntocco; Dec 5, 2017 at 10:33 AM.
Melting Slicks
Joined: Jul 2008
Posts: 2,269
Likes: 142
From: Ottawa Ontario
Yes. Depending on what year you have, one of the LEDs on the climate control panel will flash when the ignition is first turned on if there is a problem with the blend door.
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
Assuming it's not a mechanical problem with the blend door/motor, look at the HVAC programmer. It's mounted on the firewall above the gas pedal. It is common for the resistors associated with the blend door motor to overheat. You will see black burn marks on the PC board and/or crystallized solder on those resistors.
Le Mans Master
Joined: Jan 2006
Posts: 5,621
Likes: 206
From: Orlando FL
Always state year when starting a thread.
