just had an rac bloke come check my car which was actually overheting,but also suffering from no hot air coming through the heater when switched to hot.
he found it to be the thermostat.
Fuse, switch, speed resistor or motor.
There is an electrical short to ground in the fan switch or in the blower motor itself.
AnswerBad thermostat, clogged heater core, or a defective heater control switch. If an engine has not been running long it will not have warmed up, the warmth from a car heater usually comes from the engine.
Beause there is probably a short/bad connection in the switch, or the blower motor itself
The air doors maybe stuck. Or selector switch is not is not operating correctly.
Dodges are good for blowing fuses. If that is not it, the fan switch might need replaced.
depends. is the fan blowing? if not could be switch. if so you may need to replace the heater core first thing is see if your coolent is low. if it is you will not get any heat
If you are talking about a wall switch for the heater, check to see if the heater has its own internal thermostat or switch as this might be in the off position and not allow the heater to turn on. If you are talking about a switch on the heater itself, then yes in all probability the switch is not working.
Where is heater control switch
I have a 2002 Jeep Grand Cherokee Laredo that was doing the same thing. The problem was a faulty ac/heater switch. You put the switch on ac, compresser engages, lines get cold and frosty, but only hot air is coming out of the vents, because the switch has changed back to heater even though it shows ac. The cure is to have the center panel which contains the ac/heater switch, fan speed switch and temperature control replaced.
Sounds like either the fan speed switch or the fan motor itself might be bad.
Blown fuse, defective Blower Motor Resistor Pack, Defective Blower Motor, or Defective Blower Motor speed control switch.