I just replaced my old blower with a new one. Obviouslt it doesn't work. I pulled the resistor and it seems fine. I went ahead and replaced the two prong plug after I pulled the resistor. Still to no avail. Is the actual switch bad on the console? I cannot find any blown fuses, it's cold and i'm getting pretty ill about this any help would be greatly appreciated.
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Re: Non-blowing heat and A/C blower fan.
Did u test the THERMAL LIMITER on the blower resistor? this is the part that burns out, the resistors always look fine. Replace the resistor, it is cheap and i am sure it will fix the problem. U may also wish to check the 30 Amp blower motor relay circuit breaker in the underhood fuse box, I believe it is marked HEATER.
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Try to check the power and ground on the blower fan. If you missing the ground on the blower fan connector than most likely it is the blower fan resistor (controller), it is located under the hood close to back firewall behind left cylinder head.
I had the same problem. I fix it my self. This is what you look for, is your a/c blower working when you turn the fan on. If a/c light come on but nut the blower fan.
Then under passenger dash you will see orange plug. It's held in with 2 screws. Remove 2 screws and pull resistor out. Disconnect orange plug and look at orange plug and the resistor if burn need to replace the resistor and the orange connector. That's your problem.
Now if your blower works but no power to a/c switch and you instrument nobles has no lights. Then it's a fuse check #48 and # 57 fuse that controls that
Its the blower motor resistors connection.Turn ignition and fan switches on then wiggle and pull on the resistor pigtail and fan should come on .The location of the resistor is on the passenger side of the heat duct mounted with 2 screws.
I would check for a bad connection on the blower motor resistor.Its located on the passenger side mounted on the heat duct with 2 screws.Turn the ignition and fan switches on then wiggle and pull on the connector usally if the resistor has a poor connection it will comw on.These resistors get hot and sometimes they melt the connector causes it to loose its connection.
your blower motor may be drawing too many amps causing the heat problem at the plug. If so replace the blower motor. and / or The connector plug to the blower motor resistor will melt causing it to fail. you may have to replace the blower motor resistor plug (pig tail). Lastly check your blower motor relay. Making sure you are getting full volts accross the contacts..
You don't list the vehicle your asking about but in general when the blower motor only works on the high speed the blower resistors have blown. The resistors are what control the fan speed, when they go bad only high will work. The resistors blowing is usually a side effect of a blower motor going bad, pulling too much current. When replacing the resistors it's advisable to replace the blower motor as well so as not to have a repeat problem.
Replace the blower motor resister,it is mounted right next to the blower motor,it has a lug with about 7 wires on it.Just unplug it and remove two screws to remove the resister.This controls the speeds for the blower motor.The blower motor is the cause of the resister failure.Even if the motor seems to sound,and run fine,it is pulling to many amps.