I have a 2007 Ford Explorer V6. I get great cold air but when i even slightly turn the dial to try and get heat, it starts clicking an only blows cold air. Any advice?
Bad blend door actuator. Blend doors sit on the heater core box, some are easier to get to than others. (some take removing dash to swap out, some can be reached through glove box opening or air bag opening.) Look up your blend door location and proceed from there, most dedicated forums will have a post or two on how to replace them.
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