heater switces not working, only once in aq while what to repalce?

Asked by gregob Feb 26, 2014 at 11:16 PM about the 2000 Cadillac DeVille Sedan FWD

Question type: Maintenance & Repair

try to turn heater fan on some times it works, most times it wont

1 Answer
102,625

Reelin68 answered 10 years ago

Sounds like your blower motor is bad. If you have no fan at all, it would be your blower motor. If you have only one speed all the time, it would most likely be your blower motor resistor. For a quick test, turn on your fan, if no fan comes on, take a hammer and tap on the bottom of your blower motor. If it suddenly come on, the brushes are bad in your motor. Usually located under passenger side glove box. Here's a quick video: http://www.youtube.com/watch?v=ymKzKOnI78s

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