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
Sounds like the cable attached to the switch that changes the pipes to carry warm water has snapped, if you can locate this switch you can do it manually to allow your heater to work, have a look for it around the bulkhead
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.
The air doors maybe stuck. Or selector switch is not is not operating correctly.
Where is heater control switch
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
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.
If the heater fan is not blowing on a 2001 Chevy S10 Pickup, it is possible that the fuse needs replacing. It is also possible that debris is interfering with the operation of the fan. Could also be, a faulty fan motor, a faulty fan motor speed resistor, a faulty fan motor 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.
You probably have a shorted wire going to the motor or switch. You'll have trace the wires and find the damaged section.
IT turns the heater on and off!
Check the thermostat or the thermo switch. Either one might be faulty or there might be a loose wire.
It could be the high speed heater motor relay is stuck on or the switch itself is broken.
This could possibly mean that the electrical connection for the blower is shorted or grounded or the on/off switch has lost contact. Have this checked with a car electrician.
The points terminals are probably dity ! Try blowing compressed air into the switch !
HeaterYou might need a new thermostat or heater core.Lincoln put a thermal switch in the hoses that run to the heater core in cars of this age. This switch would not allow the blower motor to run until the coolant was warm. This was a "luxury" feature to keep the heater from blowing cold air on your feet. After a few years these switchs would go bad. This could be your problem. I have replaced mine once and I'm looking into a way to bypass it. You can just use the vent function with heat to keep warm until you replace the switch, that's what I'm doing for now. I believe the switch runs about $50 from FoMoCo. You could also have the problems listed in the other answer.my Lincoln town car doesn't have the switch in the heater hose , now where do i look i have good AC but no hot air , where is the vac moter for the heater to outside air switch located ??1994 a breed by its self ?? ill just bet
A restricted/plugged heater core can do that. Try flushing the heater core.
Your heater switch may not need to be replaced. The heater high position is controlled by a fuse under the hood. Until you find the fuse and replace it, your new switch will not work. JRR.
The reason a heater fan is staying on may be an issue with the switch. It is possible the switch is stuck open. It may be resolved with a good cleaning of the contacts on the switch, or replacing the switch itself.
replace the heater temperature switch