A failed heater blend door or actuator can cause the temperature control for the HVAC system to stop working. A clicking sound from the dash area would commonly indicate an actuator fault. If the heater gets stuck on the hottest setting, the heater blend door may be broken requiring replacement of the heater box to repair the issue.
Heater Stuck on Hottest Setting Due to Broken Heater Blend Door on Ford Explorer Sport Trac
Average mileage: 93,045 (42,000–199,000)
36 people reported this problem
16 people shared problem details
2008 Ford Explorer Sport Trac44,000Visitor
clicking sound then nothing but cold air, how can I fix it myself
blend door messed up. stuck on cool air.
2007 Ford Explorer Sport Trac95,000Visitor
no heat clicking sound.
I had a problem with the heater box blend door also. I also had a clicking sound . There is a small servo that moves it back and forth the gear was stripped I pulled one at the junk yard and replaced it. I actually only changed the gear itself.
2007 Ford Explorer Sport Trac77,000Visitor
After running for a few minutes the passenger side switches to heat and will not go back to cool. If I turn off the engine it may work again.
2008 Ford Explorer Sport Trac80,000Visitor
Heat works, no cool air.
2007 Ford Explorer Sport Trac100,000Visitor
Haven't had it repaired yet.
started out as clicking problem and now is stuck on heating.
2004 Ford Explorer Sport Trac85,000Visitor
Vehicle wasn't warming the cabin... warped heating box/flap. Cost me $475.00 to replace... mainly labor because of how time consuming it was to reach/remove warped part.
2004 Ford Explorer Sport Trac199,000Visitor
This is the second time it has broken since I had my explorer...in the shop now for an estimate
2002 Ford Explorer Sport Trac159,000Visitor
Cost me 400.00 to fix
2007 Ford Explorer Sport Trac67,000Visitor
No heat clicking sound blend door problem
2007 Ford Explorer Sport Trac56,000Visitor
clicking sound started then before I had time to investigate the position 1 and 2 on the HVAC controls do not work anymore.
Passenger side stuck on hot.
2008 Ford Explorer Sport Trac42,000Visitor
hasn't been fixed yet dealer wants 1,000 to repair
2003 Ford Explorer Sport Trac112,000Visitor
Heater stuck in hottest setting,only thing i can do is cut it off when it gets hot.
THERMOSTAT, HEATER CORE, COOLANT LEVEL & BLOWER MOTOR ARE ALL GOOD. WHAT ELSE COULD BE WRONG &...
Both hoses to heater core are hot, so I know the coolant is flowing, not blocked. How do I iden...
tell me what to check
change heater core; thermostat; blend door working