A/C Blower not spinning...
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Registered User
Joined: Sep 2010
Posts: 16
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From: Gainesville, GA
A/C Blower not spinning...
This was my previous problem...
https://dodgeforum.com/forum/3rd-gen...bag-light.html
NOW I have the compressor working with no issues what so ever and my airbag light is no longer on or beeping. The issue now is my blower for my A/C is not spinning when I turn the **** to adjust the speed...I pulled the variable resistor for the blower and it was pretty coroded so I went ahead and replaced it but I still get no air out of my vents and the blower wont spin...One thing I found interesting is when I turn the **** to adjust the air speed the voltage for that switch drops to pretty much nothing...is that normal?
Need some ideas from the A/C guys before I start calling around for estimates....
https://dodgeforum.com/forum/3rd-gen...bag-light.html
NOW I have the compressor working with no issues what so ever and my airbag light is no longer on or beeping. The issue now is my blower for my A/C is not spinning when I turn the **** to adjust the speed...I pulled the variable resistor for the blower and it was pretty coroded so I went ahead and replaced it but I still get no air out of my vents and the blower wont spin...One thing I found interesting is when I turn the **** to adjust the air speed the voltage for that switch drops to pretty much nothing...is that normal?
Need some ideas from the A/C guys before I start calling around for estimates....
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Joined: Mar 2009
Posts: 19,168
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From: South GA
Just to clarify, we are talking about the inside fan blower for the vents.
The resistor block and wires is a great place to start. With the **** setting on high, the fan gets 12-14v (depends on if the engine is running or not) and at lower settings, each speed have reduced voltage. Thats how the fan goes faster or slower.
So if you have 12v+ on the high speed wires and less than that on each other lower speed wire, then the power is there, the controls are working, the wires are good.
That leaves the resistor or the blower motor. My bet would be the blower motor. Usually a bad resistor would mean 3 out of 4 speeds work meaning one part of the resistor is burnt out.
So go pull that blower motor and hit it will 12v from the battery and see if it spins of not.
The resistor block and wires is a great place to start. With the **** setting on high, the fan gets 12-14v (depends on if the engine is running or not) and at lower settings, each speed have reduced voltage. Thats how the fan goes faster or slower.
So if you have 12v+ on the high speed wires and less than that on each other lower speed wire, then the power is there, the controls are working, the wires are good.
That leaves the resistor or the blower motor. My bet would be the blower motor. Usually a bad resistor would mean 3 out of 4 speeds work meaning one part of the resistor is burnt out.
So go pull that blower motor and hit it will 12v from the battery and see if it spins of not.
Thread Starter
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Registered User
Joined: Sep 2010
Posts: 16
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From: Gainesville, GA
Just to clarify, we are talking about the inside fan blower for the vents.
The resistor block and wires is a great place to start. With the **** setting on high, the fan gets 12-14v (depends on if the engine is running or not) and at lower settings, each speed have reduced voltage. Thats how the fan goes faster or slower.
So if you have 12v+ on the high speed wires and less than that on each other lower speed wire, then the power is there, the controls are working, the wires are good.
That leaves the resistor or the blower motor. My bet would be the blower motor. Usually a bad resistor would mean 3 out of 4 speeds work meaning one part of the resistor is burnt out.
So go pull that blower motor and hit it will 12v from the battery and see if it spins of not.
The resistor block and wires is a great place to start. With the **** setting on high, the fan gets 12-14v (depends on if the engine is running or not) and at lower settings, each speed have reduced voltage. Thats how the fan goes faster or slower.
So if you have 12v+ on the high speed wires and less than that on each other lower speed wire, then the power is there, the controls are working, the wires are good.
That leaves the resistor or the blower motor. My bet would be the blower motor. Usually a bad resistor would mean 3 out of 4 speeds work meaning one part of the resistor is burnt out.
So go pull that blower motor and hit it will 12v from the battery and see if it spins of not.
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Joined: Jan 2010
Posts: 25
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From: New York
Yes.
Great write up Weed!
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Registered User
Joined: Sep 2010
Posts: 16
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From: Gainesville, GA
after hammering out like 5 different problems which eventually led to the blower motor going out as well, I got everything replaced and im up and running again.
Airbag light = gone
Compressor = working
Variable Resistor = replaced
Blower = replaced
Cold cab again...priceless...
Airbag light = gone
Compressor = working
Variable Resistor = replaced
Blower = replaced
Cold cab again...priceless...