Question about 2000 Chevrolet Blazer

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My 2000 blazer climate control goes hot for a minute than cold for a minute then back to hot again. What is the problem? I have changed the climate control module in the dash with two differant modules but it continues to do the same thing,

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I have a 1999 Blazer with climate contol with the same problem. The blended air door is behind the glovebox has a broken gear inside. You have two choices based on how much money you have. The first thing to do is pull the module out and see if the hot/cold vent door is working. The work area behind the glovebox is tight but it is manageable. I have big hands and I was able to pull mine out. You will nned a 3/8 short socket and thumb drive to turn the screws (2) screws. After I got the module out I flipped the door open to cold and placed a needle nosed vise grps to hold the door to the cold side. The door will flip back to hot if you don't secure the flap. A new one cost about $180.00 just for the part.

Posted on Jun 02, 2010

Testimonial: "The motor that operates the blended air door had a broken gear. We got another motor at a bone yard for $16.00 and it solved the problem."

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