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heater/ac door location needed
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jack frausto
User
Dec 23, 2009, 4:01 PM
Post #1 of 6
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heater/ac door location needed
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Location of the heater/ac door on a 1989 chevrolet 1500 4x4 5.7l. The heater core is not blocked. I changed the therm and the input hose is warm while the output is cool. So I need to find out the location of the door to open or close to pass this hot air. I live in Wisconsin and a snow storm is to be here again for christmas.
(This post was edited by jack frausto on Dec 28, 2009, 5:17 PM)
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steve01832
Veteran
Dec 23, 2009, 8:15 PM
Post #2 of 6
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Re: heater/ac door location needed
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Hi Jack. Let the engine get to normal operating temperature. Then grab the heater hoses. If they are both hot, the core has good circulation through it. If one hose is hot and the other is cold, the core is restricted and needs to be replaced.
Steve
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re-tired
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/ Moderator
Dec 30, 2009, 7:23 PM
Post #3 of 6
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Re: heater/ac door location needed
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Item #9 is the blend door actuator . Remove it and carefully turn the shaft with pliers ,clockwise and then counter clockwise with eng warmed up and blower on. If you feel heat the actuator is bad . http://gsi.xw.gm.com/image_en_us/gif/000/000/372/372168.gif
LIFE'S SHORT GO FISH
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jack frausto
User
Jan 5, 2010, 12:55 PM
Post #4 of 6
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Re: heater/ac door location needed
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Ok the only question i now have is do I have to remove the dash to remove or check? I also have replaced the heater core and still no heat. I have taken the truck into a local mechanic who mainly works on engine and trany issues. He told me that he looked at the door and was working properly and has no idea what may be the issue with everything that I have replaced and checked. So now I am still back to square one. I have let the truck run and adjust the heater while the truck is running. From cold to hot, and still no heat. I need the truck to tell me what is wrong so I can fix it and move on to the other issues it has.
The truck also heaitates when I accelerate then catches and takes off. This could be a separate issue, but I was told that the coolant temp sensor is the reson the truck is hesitating. Just wondering if these issues are separate or could have something to do with each other?
(This post was edited by jack frausto on Jan 5, 2010, 1:02 PM)
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re-tired
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Jan 5, 2010, 2:09 PM
Post #5 of 6
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Re: heater/ac door location needed
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How did the mechaic Look at the door ? You cannot see the door operate from outside . THe actuator may be running , you can put your hand on it and feel in hum, but the shaft may be broken (it does happen). The only way to tell for sure is to take the actuator off and manually turn the door fom stop to stop. The link I sent shows where the actuator is .You do not need to remove the case to remove the actuator . The best way to solve a problem is to elminate one possible cause at a time . This should be one you things to check with own eyes .
LIFE'S SHORT GO FISH
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jack frausto
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Jan 5, 2010, 2:21 PM
Post #6 of 6
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Re: heater/ac door location needed
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yeah i removed the accuator and i still have no heat. when i closed the door it only switched the air flow from heater to vent, not only that, but i tried to get it to defrost just kept blowing through vent.
Is there a coolant sensor and if so how do u remove and replace?
(This post was edited by jack frausto on Jan 5, 2010, 3:44 PM)
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