Heater fan not working - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**HIGHWAY BY THE SEA** · 10-12-2016, 10:43 AM

When I got my 81 stepside back from the paint shop I noticed that the heater switch fan no longer works. The light that illuminates the heater switch box has power so I am stumped. I found no blown fuses either, and the heater box was bought NOS from a Buick dealership by me. Am I overlooking something?

tucsonjwt · 10-12-2016, 10:55 AM

I would remove the heater control from the dash and wiggle the connector at the fan switch. In my case, the connector had dried out in the Arizona heat and was no longer making good contact. Wiggling the switch with the fan in the on position made the fan work intermittently. The switch harness with connector is still available from AC Delco.

**HIGHWAY BY THE SEA** · 01-07-2017, 11:53 AM

Quote:

Originally Posted by tucsonjwt

I would remove the heater control from the dash and wiggle the connector at the fan switch. In my case, the connector had dried out in the Arizona heat and was no longer making good contact. Wiggling the switch with the fan in the on position made the fan work intermittently. The switch harness with connector is still available from AC Delco.

Sorry for the late update, I just bought a house!

I did that but still nothing. I checked the fuses and wires with nothing unusual found. The painter painted the wire blades on the fan itself under the hood, but I Dremel Tooled it off them and still nothing. I am beginning to suspect the fan itself...

**TKCR** · 01-07-2017, 11:59 AM

The last post on this thread offers some troubleshooting

http://67-72chevytrucks.com/vboard/s...d.php?t=654595

10-12-2016, 10:43 AM	#1
HIGHWAY BY THE SEA Senior Member Join Date: Nov 2012 Location: BY THE CAROLINA SEA Posts: 922	Heater fan not working When I got my 81 stepside back from the paint shop I noticed that the heater switch fan no longer works. The light that illuminates the heater switch box has power so I am stumped. I found no blown fuses either, and the heater box was bought NOS from a Buick dealership by me. Am I overlooking something? __________________ FRANKENTRUCK 1981 Chevrolet C10 Shortbed Stepside GRANDTRUCK 1968 Chevrolet C10 Stepside Longbed http://67-72chevytrucks.com/vboard/s...d.php?t=584617 PROJECT JIGSAW 1967 GMC C3500 GREAT WHITE 1986 Blazer M1009 454 engine w/700R4 transmission gas conversion

10-12-2016, 10:55 AM	#2
tucsonjwt Registered User Join Date: Jul 2007 Location: Tucson, AZ Posts: 3,195	Re: Heater fan not working I would remove the heater control from the dash and wiggle the connector at the fan switch. In my case, the connector had dried out in the Arizona heat and was no longer making good contact. Wiggling the switch with the fan in the on position made the fan work intermittently. The switch harness with connector is still available from AC Delco.

01-07-2017, 11:59 AM	#4
TKCR Senior Member Join Date: Oct 2014 Location: Ohio Posts: 6,991	Re: Heater fan not working The last post on this thread offers some troubleshooting http://67-72chevytrucks.com/vboard/s...d.php?t=654595 __________________ FB Page for my Seats Belts https://www.facebook.com/73-87-Chevy...9439407476735/ Restoring Seatbelts: http://67-72chevytrucks.com/vboard/s...d.php?t=809750 SOLD My 86 Build:http://67-72chevytrucks.com/vboard/s...d.php?t=654972 Past Restored Bench Seats:http://67-72chevytrucks.com/vboard/s...d.php?t=715398 PayPal link to pay for your items: https://www.paypal.me/TKCR



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