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Heater

Tiny
1JOHNSON
  • MEMBER
  • 2000 CHEVROLET SILVERADO
  • 5.3L
  • V8
  • 2WD
  • AUTOMATIC
  • 235,000 MILES
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
Thursday, April 21st, 2016 AT 11:40 AM

8 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
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.
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Thursday, April 21st, 2016 AT 12:37 PM
Tiny
1JOHNSON
  • MEMBER
  • 4 POSTS
Thank you
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Thursday, April 21st, 2016 AT 12:41 PM
Tiny
1JOHNSON
  • MEMBER
  • 4 POSTS
Pulled the fuse, it didn't seem to work. It was worth srry thank you
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Thursday, April 21st, 2016 AT 1:50 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
You'll have to get the control head scanned for codes then. Also was the a/c recharged after you did heater core?
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Thursday, April 21st, 2016 AT 3:31 PM
Tiny
1JOHNSON
  • MEMBER
  • 4 POSTS
Have not recharged the a/c yet, but would that cause it to blow hot air when it is off?
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Thursday, April 21st, 2016 AT 3:33 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,942 POSTS
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
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Thursday, April 21st, 2016 AT 5:02 PM
Tiny
1JOHNSON
  • MEMBER
  • 4 POSTS
Will do. Thank you
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Thursday, April 21st, 2016 AT 5:12 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,942 POSTS
Please let us know what you find
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Friday, April 22nd, 2016 AT 7:42 AM

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