Are you talking about the recirculation door?

Answered by saturntech9 (expert)
23,155 answers provided

i think so.i can feel the clicking behind blower motor.i can feel doors openong and closing,but motor acts like it wont stop trying to open or close.does it have a limit switchor what tells it to stop??

Response from bkb1024
1 question asked

So if you change from recirculation to open air does the noise change?It sounds like you may have a broken recirculation door shaft.The recirculation door uses a actuator that depends on the resistance of the door when it reaches its stop toshut off.

Answered by saturntech9 (expert)
23,155 answers provided

yes.it sounds like it changes tones and locations.had to change fan switch.burnt pin reversed polarity in switch

Response from bkb1024
1 question asked

Then sounds like the recirculation shaft could be broken.

Answered by saturntech9 (expert)
23,155 answers provided