Blower only runs on high??
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Tuned
Joined: Jun 2003
Posts: 489
Likes: 1
Blower only runs on high??
My interior blower only runs if I switch it to "High", doesn't matter if it is A/C or just heat/vents. I replaced the control switch in the dashboard, but that wasn't it. The only other thing I notice is that when I shut it off from high, I can hear the blower motor make a rumble like the edges are hitting something? Could the blower motor be the problem, or is there another control somewhere else that could be bad.
it's a 93 F150
it's a 93 F150
Post Fiend
Joined: Nov 2002
Posts: 9,987
Likes: 7
From: Memphis, TN
Blower only runs on high??
I agree that it's probably the resistors, but the noise may mean it's full of leaves. Pull the blower motor out & reach inside. If it's got leaves in it, pull the evaporator cover & evap core, and hose it all out. It'll give you an opportunity to recover all the pens & change that has fallen down your defrost registers. 
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