rebuilt heater doesn't work - The 1947 - Present Chevrolet & GMC Truck Message Board Network

nac593 · 05-15-2008, 04:54 PM

I took it all apart, cleaned it, and replaced the heater core. Before the fan worked, now it doesn't. It has 12v and the ground is good. I checked the switch in cab on heater box (themal switch?) on pass. side. It has 12v. I wanted any ideas before I take it apart because I used gasket sealer when I put it together.

jayharrell · 05-15-2008, 05:46 PM

Get a couple short pieces of wire and run straight from the battery to the fan with a hot and neg. If it works, then you have to trace it backwards.

Check the fuse. But more then likly its a bad ground. I had to get a drimal tool and take it to the metal on the cab and the fan to get the gound to work.

05-15-2008, 04:54 PM	#1
nac593 Registered User Join Date: Sep 2007 Location: san diego,ca Posts: 125	rebuilt heater doesn't work I took it all apart, cleaned it, and replaced the heater core. Before the fan worked, now it doesn't. It has 12v and the ground is good. I checked the switch in cab on heater box (themal switch?) on pass. side. It has 12v. I wanted any ideas before I take it apart because I used gasket sealer when I put it together.

05-15-2008, 05:46 PM	#2
jayharrell Gettin By on Gettin By Join Date: Jan 2008 Location: Cedar Creek, Tx Posts: 1,033	Re: rebuilt heater doesn't work Get a couple short pieces of wire and run straight from the battery to the fan with a hot and neg. If it works, then you have to trace it backwards. Check the fuse. But more then likly its a bad ground. I had to get a drimal tool and take it to the metal on the cab and the fan to get the gound to work. __________________ 69 CST10 LWB 455 Buick 00 S10 2.2 Vin5 76 GL1000 Naked 1bl VW carb "Adios to all the concrete; Gonna get me some dirt road back streets"



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