AC is blowing out HOT air... How to get to the Blend Door to check it?
1999 GMC Jimmy starts blowing out hot air in the first 5 minutes running and then will not be cold at all. Seen information that the blend door or acuator is stuck or not working properly. How do I get to the blend door and/or actuator?
no cold air is coming out and its charged
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I fixed the problem. It was the blend door actuator, but the wheels continued to turn because the reset operation requires resistance to know when the blend door is at its limit for the hot and cold side. At least that is what I assume. If the actuator is tested off of the blend door, it will simply turn until it can't turn anymore. After installation, it worked fine.