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Heat/AC

Tiny
TERREWRIGHT
  • MEMBER
  • 2001 CHEVROLET TAHOE
  • 5.3L
  • 2WD
  • AUTOMATIC
  • 200,000 MILES
When the heat is on it blows cold, when the AC is on during the summer it blows hot. What could this be? What part will I need to replace?
Monday, February 12th, 2018 AT 9:21 AM

5 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good afternoon.

When you command hot and cold and back again, can you hear the mode door in the dash moving back and forth?

When you turn on the AC, does the compressor come on?

Lets start with basics.

Roy
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Monday, February 12th, 2018 AT 1:16 PM
Tiny
TERREWRIGHT
  • MEMBER
  • 3 POSTS
Yes I can hear it moving back and forth. I am not sure how to tell if the compressor is coming on.
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Monday, February 12th, 2018 AT 1:59 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Look at the front of the compressor. When the AC is activated, it will be turning. That is called the clutch.

Roy
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Monday, February 12th, 2018 AT 2:01 PM
Tiny
TERREWRIGHT
  • MEMBER
  • 3 POSTS
Okay.
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Monday, February 12th, 2018 AT 2:06 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Let me know.

Once we know that then we can continue as to possible issues.

Roy
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Monday, February 12th, 2018 AT 2:09 PM

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