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2002 chevy trailblazer_ls_ext
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2 Posts
Discussion Starter #1
:hail:
I have a problem with the heater shutting down and then coming back on. When this happens the TB is still cold and the heater just shuts down before reaching the desired temperature. Can someone please help us diagonois this problem. Mileage is under 60,000 but warranty has run out. Hate the service department at the dealership.
 

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2003 chevy trailblazer_ltz
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35 Posts
Hey Park, do you have a manual or auto HVAC? I had a similar problem with my 2003 Trailblazer (auto system) and it ended up being the blower control module that fixed it. Some owners reported bad wiring at the connection between the blower motor and the control module. The blower control module appears to be the weak link in the system. Good luck and have a nice day.

Dave
 
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