Heater question... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

xtreme80 · 11-23-2007, 02:22 AM

My 80 C10 has factory air and heat, and the AC blows cold, and it blows hard out the vents, but when I turn on the heater, it won't even trickle out unless I'm moving. I can turn the selector to heat or off and it still blows out the hot air, but just barely.

Is there a relay somewhere that allows the fan to kick on when you have "heater" selected on the unit? Is it the same relay as the regular AC relay? I know there's one for the AC that has like 6 or 7 wires coming off it. Is this the same relay?

Sheesh, I need a wiring diagram if anyone's got it.

Thanks!

11-23-2007, 02:22 AM	#1
xtreme80 Wishin' I had more money! Join Date: Feb 2007 Location: Eugene, OR Posts: 1,242	Heater question... My 80 C10 has factory air and heat, and the AC blows cold, and it blows hard out the vents, but when I turn on the heater, it won't even trickle out unless I'm moving. I can turn the selector to heat or off and it still blows out the hot air, but just barely. Is there a relay somewhere that allows the fan to kick on when you have "heater" selected on the unit? Is it the same relay as the regular AC relay? I know there's one for the AC that has like 6 or 7 wires coming off it. Is this the same relay? Sheesh, I need a wiring diagram if anyone's got it. Thanks!



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