1997 Ford Explorer Q&A
1997 Ford Explorer Question: heater not functioning
Does the blower work on the high setting? If so, it's possible the blower resister pack or blower speed control has gone bad (depends on your style of heater system). If no speeds work, it could be the control panel but you'll want to confirm that with some voltage checks. They have a free repair guide here that might come in handy http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c1528018eeea - Andy Y
I purchased my explorer used and heater control valve had been removed, I knew a part was missing because vacuum line was plugged off. I just recently found out what it was for. the heat & air s...