The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Help! How can I get my heater fan to stop running????

jhow66 · 09-08-2006, 11:57 AM

Ok then unhook the fan switch. If blower does not run then your switch has to be the problem. Most likely you will find that the switch has been getting hot (melted plastic from loose connection). This causes the parts inside the switch to fail (springs, tabs, etc. loose their tension from the heat). The other two speeds on the switch are controled by a resistor on the back side of heater box. Do they work?

09-08-2006, 11:57 AM	#15
jhow66 Registered User Join Date: Jun 2002 Location: Knoxville Tenn. Posts: 3,058	Re: Help! How can I get my heater fan to stop running???? Ok then unhook the fan switch. If blower does not run then your switch has to be the problem. Most likely you will find that the switch has been getting hot (melted plastic from loose connection). This causes the parts inside the switch to fail (springs, tabs, etc. loose their tension from the heat). The other two speeds on the switch are controled by a resistor on the back side of heater box. Do they work? __________________ 56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer