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Ask Ricardo Hohl Your Own Question
Ricardo Hohl
Ricardo Hohl, ASE Master Certified Tech
Category: Car
Satisfied Customers: 4300
Experience:  Automotive instructor at Porter and Chester institute
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My 1999 Escalade ac /heater control keep going out. When i

Customer Question

My 1999 Escalade ac /heater control keep going out. When i push the AC button the contro; panel starts smoking and smeel like a wire burning or i can turn the knop on to the defrost side and it does the same thing. Then will have to go buy a new control AC / Heater control
Submitted: 4 years ago.
Category: Car
Expert:  Ricardo Hohl replied 4 years ago.

transman : Hi welcome to just answers i
transman : Hi welcome to just answers, it seems like you may have a shorted blower motor, have you check the blower motor?
JACUSTOMER-my48culp- :

No i haven't but the blower motor still comes fine. Cause it works fine til I push the AC button or turn the switch too the defrost side. The blower still runs

JACUSTOMER-my48culp- :

Thats all no other options

transman : Ok , the only things that can short out the control head is the blower motor with hi resistance or the a/c one way diode shorted you are going to have to try out by disconnecting both and trying the control head
transman : You have to isolate this two isolate the problem
transman : If the problem is gone then one of this two is causing the problem.
transman : At this point because of the hi resistance is showing there is just no other way to check
JACUSTOMER-my48culp- :

OK i will try unhooking the blower motor to see what happens

transman : Ok.
transman : Tak your time.