heater is not working?

110,000 MILES • 6 CYL • AWD • AUTOMATIC
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BRGRAFTON
  • MEMBER
  • 1 POST
started to make a funny noise sounds like some kind of switch switching on and off today heater is not working? please help.
Jun 14, 2010 at 3:57 AM
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SQM
  • ✓Experienced Mechanic
  • 6,383 POSTS
Hello,

It sounds like you might have an issue with the blend door actuator. As it is stuck at one position and making the clicking noise.
The blend door actuator is what controls the flow from hot to cold air.
It is located under the dash on the passenger side (see diagram below)

Here is an article you might find helpful:

https://www.2carpros.com/articles/replace-blend-door-motor

I have also attached the diagrams for the blend door actuator/motor.

Please let me know of any questions.

Thank you.
Aug 3, 2021 at 8:11 AM
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