need to replace the blower motor relay located bhind the fan under the dash
has anyone replaced the relay switch?
A restricted/plugged heater core can do that. Try flushing the heater core.
The heater switch can be replaced on a Chevrolet Corsica by removing the three wires from the back of the switch. Put the wires onto the new switch and return it to its slot.
The headlight switch is not repairable in a Cavalier. The switch will need to be removed and replaced. The procedure is different, depending on the Cavaliers year.
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 light in the switch can not be changed, the whole switch would need to be replaced.
I just replaced the front heater motor in my 99 Suburban, it worked great, now the heater/ac absolutely does nothing. Could the switch be bad, the motor, I am stumped and need help. Thanks Jim.
try replaceing the switch that controls the low to high for heater It's gonna be the blower motor resistor (near the blower motor).
usually it is a vacuumn problem right at the heater control switch or sometime under the hood
computer needs to be replaced
Chances are that the overdrive solenoid (forgive my spelling) inside the transmission needs replaced. Not a job for the light-hearted.
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.