1997 Ford Explorer Q&A
1997 Ford Explorer Question: Why does my 97 the AC switches to heater on it's on?
probably the heater wire is making contact and causing the heater to come on. - Melcard
There is a heater control valve under the hood, IF this valve is not stopping the flow of HOT coolant from entering the hvac unit, that will cause this problem! Located in the heater hose near firewall. - pushrod
AGREE WITH PUSHROD OR ITS A BLEND DOOR ISSUE IF EQUIP - globalhelper