Hi....I'm new to the forum and hoping that someone can give me some advice here. I have a 96 Gmarq LS with EATC. There is a clicking noise which I believe is the blend door actuator. I get heat ( lots of it) and the a/c blows cold, however occasionally it switches to hot - shut if off for a few mins and I get cold again. The fan only operates at high speed. Am I dealing with two issues here - replace the blend door actuator as well as the fan resistor? Any advice would be greatly appreciated !!

Thanks