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Re: No “off” option for heater fan?
If you have controls like this the top lever will shut off the fan in the 'off' position but you will still have air flow while driving.
If you are still getting only hot air then it sounds like a blend door issue or the control cable needs to be adjusted.
http://www.73-87chevytrucks.com/tech...ice_Manual.pdf
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'51 South Bend Model "9A"
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'74 Chevy Cheyenne Super K20-restored on 37's
'72 GMC Sierra Custom K2500- in progress
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