its never happened before...just after being gone 30 min i noticed it wouldnt heat up
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1997 Ford Ranger Question: my heater wont get warm anymore but my temp hand stays at normal.whats wrong???
Answer #1Baumbach23 December 01, 2012, 20:22Enthusiast
its possible that the heater hot/cold blend door in the heater is broken (Common problem with rangers and explorers) I just replaced mine for the same problem. The door is plastic and the plastic fatigues at the socket where the control motor attaches to the door and breaks. The instructions say to remove the HVAC plenum (Heater assembly) but with a little patience and the proper parts and tools it can be done without removing the dash to get to it. To see if this is the problem remove the glove box to access the heater temp control servo motor (white box w/4wire connector) You have to pry it off the mounting pegs - gently! turn on the ignition and heater, move the temp knob and watch the peg in the bottom of the motor, it should turn slowly. If it does then the door is broken. If it doesn't then the servo motor has konked out. Before you put it together feel where the peg fits into the blend door. if you feel any rough edges in the D shaped socket the door is broken and you will have to replace the door.