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Car heater

Tiny
CHEROKEECHUCK82011
  • MEMBER
  • 1999 CHEVROLET MONTE CARLO
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 180,000 MILES
My heater only blows cold air, and I hear clunk sound underneath, and when I hear it, I get hot air for 3 seconds
Friday, February 11th, 2011 AT 1:53 PM

3 Replies

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
Sounds like a blend door that is stuck. These direct heat to vents and lower vents. If they are stuck (closed), you would not get heat.
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Friday, February 11th, 2011 AT 1:57 PM
Tiny
CHEROKEECHUCK82011
  • MEMBER
  • 3 POSTS
But I cant seem to find a blend door for a 99 monte. Does it have a blend door on it?
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Friday, February 11th, 2011 AT 3:15 PM
Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
They are inside air ducts. They are mechanical "doors" that divert air as mentioned.
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Friday, February 11th, 2011 AT 6:43 PM

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