Rick's Free Auto Repair Advice

Posts Tagged: AC blows warm air

AC blows warm air except in MAX mode – Ford

AC blows warm air except in MAX mode, Explorer, Mercury Mountaineer This one will really make you nuts. You set the A/C on cold and you don’t get any cold air. You’re thinking you’ve got an A/C problem. Low of refrigerant? Bad compressor? But then you switch it to MAX A/C and all of the sudden it blows cold. What gives? Well, if you’re driving a 1995-98 Ford Explorer or Mercury Mountaineer, the fix may be as simple as a bum blend door in the heater box. This only happens … Read More

AC blows warm air on GM vehicle

AC blows warm air on GM vehicle How to diagnose an AC blows warm air condition on a GM vehicle I’m using a 2004 Chevrolet Malibu for this article. But other car makers use similar systems. Start by opening the PDF to the right. It’s a typical wiring diagram for a GM AC system. If you have an older vehicle or your vehicle is overheating, skip down to the EXCEPTIONS at the bottom of this article. After you’ve read this, get your hands on the diagram for your particular vehicle … Read More


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