Heater

2000 CHEVROLET SILVERADO
235,000 MILES • 5.3L • V8 • 2WD • AUTOMATIC
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1JOHNSON
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Recently changed heater core and now it blows hot air even when off. Recycle air and a/c buttons will not engage either? Is it possible the intake/outtake hoses could be backwards
Apr 21, 2016 at 11:40 AM
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HMAC300
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not likely all that would do is where hoses would direct the air. pull hvac fuse inside car for 60 seconds with key on see if it resets anything.recheck your work as well as you may have left off an electrical or vacuum connection.
Apr 21, 2016 at 12:37 PM
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1JOHNSON
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Thank you
Apr 21, 2016 at 12:41 PM
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1JOHNSON
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Pulled the fuse, it didn't seem to work. It was worth srry thank you
Apr 21, 2016 at 1:50 PM
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HMAC300
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you'll have to get the control head scanned for codes then. also was the a/c recharged after you did heater core?
Apr 21, 2016 at 3:31 PM
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1JOHNSON
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Have not recharged the a/c yet, but would that cause it to blow hot air when it is off?
Apr 21, 2016 at 3:33 PM
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STRAILER
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Hey 1johnson,

It sounds like you forgot to plug in one of the blend door actuators, can you please double check for us? Or the blend door is caught on something

Best, Ken
Apr 21, 2016 at 5:02 PM
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1JOHNSON
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Will do. Thank you
Apr 21, 2016 at 5:12 PM
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STRAILER
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Please let us know what you find
Apr 22, 2016 at 7:42 AM