The knob for heater doesn't work for the front at all but for the back seat the heat works any suggestions on how i can fix the problem there is heat in the truck but not in the front or the truck only in the back i think it maybe a disconnected plug some where but i don't know where

SOURCE: 92 honda accord

is it the temperature control knob or the fan speed knob? the temperature control knob is hooked to a cable that operates a valve in the engine compartment. sounds like this is your trouble area...you can open the hood and locate the heater control valve near the firewall...have someone turn the knob to see if the valve lever opens/closes. if it does it is bad. if it does not move there is a problem in the dashboard behind the heater control unit.

SOURCE: heater not working

the thermostat may be stuck open.or there may be a problem with the door in the heater box that controls the hot and cold air.........or the linkage from the hot cold switch to the door in the heater box

Marvin

• 85242 Answers
• Posted on Dec 17, 2008

SOURCE: heater valve

there is no heater control valve in this truck, heat control is done through what are called blend doors. So the issue may be the front blend door motor has failed, this is very common on all Ford heatimng systems except the Focus.

SOURCE: 04 jetta - psgr seat heater stopped working - suggestions to fix?

Check with your local dealer or call me at 904-322-5150 my name is Adam. There may be an open recall that will solve your problem.. If so it can be fixed at no cost

SOURCE: 2000 expedition heat problem

first of all I would make sure the car has proper amount of coolant and you are right it is very possible you have an air pocket in the system also ask your self did you change the thermastat after you did the heater core when the car is cold make sure there is coolant at the cold mark on the reservior bottle because you might not have enough coolant then start the car and get it up to temp and if the coolant goes not go up to the hot mark when the car gets to temp you do not have enought coolant just keep adding coolant and you will see the bubble after the thermastat opens