87 v1500 heater question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Plunkett · 12-11-2013, 06:46 PM

So I've been having problems with the heater in my truck. The first problem was that it wouldn't blow hot. I replaced the thermostat with a 195degree piece, the heaters hoses going to the heater core are hot. I finally noticed that the cable that controls the temp has a broken tab which isn't fully shutting the blend door. My other problem is that I have air blowing out all the vents when the defrost is on. I noticed that the rod coming over that actuated the change from defrost to heat doesn't move at all. Is it just a cable that I need to replace to fix that problem or what?

12-11-2013, 06:46 PM	#1
Plunkett Registered User Join Date: Nov 2009 Location: Chattanooga, TN Posts: 140	87 v1500 heater question So I've been having problems with the heater in my truck. The first problem was that it wouldn't blow hot. I replaced the thermostat with a 195degree piece, the heaters hoses going to the heater core are hot. I finally noticed that the cable that controls the temp has a broken tab which isn't fully shutting the blend door. My other problem is that I have air blowing out all the vents when the defrost is on. I noticed that the rod coming over that actuated the change from defrost to heat doesn't move at all. Is it just a cable that I need to replace to fix that problem or what? __________________ 1987 gmc sierra v1500. 350 tbi, 700r4, 6" sky jacker lift, 15" Mickey Thompson wheels, and 35" bf Goodrich km2 tires.



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