heater

Asked by Jan 31, 2016 at 06:23 PM about the 2000 Chevrolet Blazer 4 Door LT 4WD

Question type: Maintenance & Repair

The heat in my blazer only blows cold air unless
I'm on the highway then it works fine. Don't want
to but my parts until I know what to get. Any of you
know what I should do?

6 Answers

73,065

Sound like it is low on coolant.

I thought so to but I filled it 2 days ago and it is still full.

73,065

There are a couple of things, first does this Blazer have AC?

Yes and it works fine.

73,065

There is a AC Panel Mode Door Actuator that looks like it is vacuum operated that may have a bad vacuum line running to it or its just bad, and there is a AC,Heater Vacuum Check Valve you may want to check out.

Okay I'll check it out.

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