Heater A/C question??? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

VanceH · 09-16-2009, 02:56 PM

Ok, i have tore my heater box apart to clean it up a bit and see if i can make it work, found a short in the fan switch so now i have low and med (no High???) but i cant seem to get the air to the defrost, it only comes out of the A/C ducts??? I was looking at LMC and the diagram shows #11 as the control box any ideas on what is up??? Also what diaphram under the hood stops the hot air from blowing all the time?? I have two one close to the fire wall and one looks like the A/C hose?

09-16-2009, 02:56 PM	#1
VanceH Loving the Jimmster Join Date: Jun 2008 Location: Emmett, idaho Posts: 575	Heater A/C question??? Ok, i have tore my heater box apart to clean it up a bit and see if i can make it work, found a short in the fan switch so now i have low and med (no High???) but i cant seem to get the air to the defrost, it only comes out of the A/C ducts??? I was looking at LMC and the diagram shows #11 as the control box any ideas on what is up??? Also what diaphram under the hood stops the hot air from blowing all the time?? I have two one close to the fire wall and one looks like the A/C hose? Attached Images Last edited by VanceH; 09-16-2009 at 02:58 PM. Reason: adding



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