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06-27-2014, 03:52 PM
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#1 |
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Registered User
Join Date: Jan 2014
Location: toledo oregon
Posts: 17
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heater fan runs constantly
my heater fan motor runs when switch is off.do i have a wire connected wrong somewhere?
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06-27-2014, 03:58 PM
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#2 |
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Registered User
Join Date: Apr 2014
Location: Bloomington Indiana
Posts: 1,041
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Re: heater fan runs constantly
Nope. Federal requirements for trucks is/was that they maintain positive cabin pressure to keep exhaust fumes out of the cabin. There is no "OFF" position, just LO, MED, and HI.
__________________
Rich Weyand 1978 K10 RCSB DD. |
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06-27-2014, 05:56 PM
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#3 |
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Registered User
Join Date: Jul 2007
Location: Tucson, AZ
Posts: 3,189
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Re: heater fan runs constantly
It was a new fangled thing - "flow thru ventilation."
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06-27-2014, 11:09 PM
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#4 |
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Registered User
Join Date: Jan 2013
Location: Jasper, IN
Posts: 948
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Re: heater fan runs constantly
It was a good idea at the time...
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When in doubt, throttle it out! 1974 Chevrolet Custom K20 2005 Ford Ranger Edge 1985 Chevrolet Custom Deluxe C10 |
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06-27-2014, 11:34 PM
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#5 |
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78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: heater fan runs constantly
I cut the brown wire off the back of the switch.
Low becomes off. Prefer when I can turn everything off, and nothing is on to start the truck.
__________________
John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
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