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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

blower motor question

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Old Nov 18, 2003 | 08:58 AM
  #1  
ksvtwin's Avatar
ksvtwin
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Mountain Pass
Joined: Sep 2003
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blower motor question

I'm working on a '93 F150. The blower motor will only run in the highest setting. It will not run in the other 3 lower positions regardless of whether it's set on air conditioning or heater. Does that sound like the switch might be bad? I guess the motor is still good because it runs. Thanks for any help, KS
 
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Old Nov 18, 2003 | 09:41 AM
  #2  
Bob Ayers's Avatar
Bob Ayers
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Joined: Jan 2003
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From: Durham, NC
The blower motor resistor assembly is bad. It should be mounted
into the heaterbox on the firewall...good luck!!!
 
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Old Nov 19, 2003 | 02:25 AM
  #3  
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vanmancan
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From: N.E.
As Bob mentioned above it is likely the blower resistor.

It is a little 1X2 inch contraption with little wire loops on it. it is screwed with a couple of screws on the heater box near the blower motor. You'll find it at a dealer.

When you remove the resistor module, before placing the new one, remove some of the debris (such as dry leaves etc.) that has likely accumulated in the area of the resistor.

Good luck.
 
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Old Nov 19, 2003 | 04:45 AM
  #4  
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Godder
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Re: blower motor question

Originally posted by ksvtwin
Does that sound like the switch might be bad?
I had the exact same problem with my 89. The fan speed switch on the dash was the culprit. I bought a new one from Advance Auto and it resolved the problem.
 
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Old Nov 19, 2003 | 07:41 AM
  #5  
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ksvtwin
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Mountain Pass
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Thanks for the advice. In my case I think it is the resistor. I will check it out this weekend and replace it. Thanks for the advice!!
 
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