This is normal on GM vehicles. The motor always runs at a very low speed.
On most makes of cars this problem is fixed by replacing a blower motor resister and not the switch.
The heater blower motor speed resister is burned out.
most likely it is your blower motor switch in your heater panel in your dash. the switch is burnt in the on position. replace switch from auto part store; if the switch keeps burning out it is due to the brushes in the blower motor being worn out. replace motor
It could be the high speed heater motor relay is stuck on or the switch itself is broken.
The wiper motor has a switch inside of it. When they are turned off and the wipers go to the down position it trips the switch in the motor that tells the computer they are in the down position. If that switch in the motor is faulty, the wipers are repositioning until the switch is tripped to the off position. THE FIX.... Replace the wiper motor.
Check to see if you are getting power and ground to the blower motor - if so blower motor is bad. If no power possibly fan switch or selector switch Also check the blower motor resistor, found in heater plenum.
It is false that the stat ignition switch position only activates the starter motor.
Remove the center switch console. remove the 4 spring clips holding the square heater motor housing and remove the housing. Inside the heater motor housing Remove the two spring clips holding the heater motor in Remove wiring connections and then remove the heater motor. Install new heater motor and installation is in the reverse order of above.
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.
Heater motor switch and or the connection at the switch is melted. Also check connections at the blower motor and blower motor resistor for melt down damage.
the switch, or the blower motor resistor, or blower motor usually it the last two at one time
In a 1997 Jeep Wrangler, the relay switch for the heater blower and motor is located behind the dash. It will be directly behind the HVAC knobs behind the dashboard.
Blown fuse, bad heater blower motor control switch, bad blower motor, or a bad blower motor resistor pack.
Depends on what you mean by heater will not work. If the blower motor will not work, it can be a blown fuse, bad blower motor, bad blower motor switch, or a defective blower motor resistor pack. If you mean that the blower motor works but there is no heat, then it can be a clogged heater core, thermostat stuck open, or defective heater control valve.
Run a new ignition switch controlled "hot" wire directly to fan motor
If you are talking about motor control then the answer is yes. There are two things to take into account though. One, is the motor thermally protected. This is for overload protection. On fractional HP motors it will indicate this on the nameplate. If the motor is not protected, then a fractional HP motor switch should be used. Incorporated into this switch is a heater element that the motor current flows through. If the motor current gets over the motor nameplate rating then the heater trips the switch and shuts the motor off. The other thing is that the switch has to be motor rated, currents and voltage matching the motor nameplate ratings. The specific switch has been designed to open motor currents under full motor loads. An ordinary house light switch is not motor load rated and should not be used for this purpose.
Defective blower motor resistor pack.
From Den052 auto mechanic easiest way is to go to junkyard and remove part of the harness and maybe the switch if it is still good. Splice and replace as necessary. Keep in mind, check heater motor draws too much amperage and will burn out new switch. Usually the case!!!!!!!! Install new heater motor too (real common problem).
If by quit working you mean quit blowing, the things to troubleshoot are the blower motor, the blower motor resistor switch, or the blower motor speed selector switch. If by quit working you mean it only blows cold or warm air, the thermostat is probably stuck in the open position.
It is the resistor, replace it.
As heater motors age, they tend to draw more amps than they should. Yours is probably drawing too much amperage causing the switch to heat up. Remedy is to replace the heater motor and possibly the switch as the terminals get hot and oxidize.
Blower motor fuse is blown. Blower motor resistor burned out. Blower motor switch bad. Blower motor bad.
try replaceing the switch that controls the low to high for heater It's gonna be the blower motor resistor (near the blower motor).
The blower motor resistor is bad and goes to high fan.
Fuse, switch, speed resistor or motor.