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How to get my Heat a/c fan to turn on high speed? #1004922
06/02/11 12:07 AM
06/02/11 12:07 AM
Joined: Dec 2003
Posts: 1,746
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plumcrazycuda Offline OP
top fuel
plumcrazycuda  Offline OP
top fuel
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Joined: Dec 2003
Posts: 1,746
PA
It will come on low & med but not high speed. I put a rallye dash in it over the winter and got to work the bugs out. It worked before so I am over looking something. Were would you look first?

Re: How to get my Heat a/c fan to turn on high speed? [Re: plumcrazycuda] #1004923
06/02/11 01:23 AM
06/02/11 01:23 AM
Joined: Oct 2005
Posts: 6,048
Back home in PA
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BulletBob Offline
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BulletBob  Offline
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Joined: Oct 2005
Posts: 6,048
Back home in PA
On your heater box is a blower motor resistor that is actually the speed control. A bad or dragging blower motor usually causes them to go bad. Blower motors get run on high most of the time. A blower motor with drying bushings will have more drag on high than at low speed. That causes more heat than it can handle & burns it out. Bob

Re: How to get my Heat a/c fan to turn on high speed? [Re: BulletBob] #1004924
06/02/11 11:17 AM
06/02/11 11:17 AM
Joined: Jun 2009
Posts: 434
sweden
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cuda-sweden Offline
mopar
cuda-sweden  Offline
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Joined: Jun 2009
Posts: 434
sweden
on my -70,i only have 2 speeds.rally ac panel.







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