Heater blows likewarm air at idle, When I accelerate the air gets hotter back to idle it gets cooler

Tiny
MICXIE
  • MEMBER
  • 2002 CHEVROLET SUBURBAN
  • 145,000 MILES
Checked the heater hoses [Both are hot]
fan does not go into high speed
Temperture gage takes a while to go to operating Temp. Falls down a little at idle.
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Saturday, February 11th, 2012 AT 6:11 PM

4 Replies

Tiny
RASMATAZ
  • MEMBER
Check the air blend door/actuator-could also be the water pump impeller
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Saturday, February 11th, 2012 AT 6:14 PM
Tiny
MICXIE
  • MEMBER
Thanks for the comeback Rasmataz, If it was the water pump impeller would'nt it overheat at idle? How do I check the air blend door/actuator? It dose'nt overheat at idle. Could it be the thermestat? Im only guessing.
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Saturday, February 11th, 2012 AT 7:28 PM
Tiny
RASMATAZ
  • MEMBER
Start by checking the thermostat
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Saturday, February 11th, 2012 AT 10:49 PM
Tiny
MICXIE
  • MEMBER
Thanks again Rasmataz Soon as the weather warms a bit Ill change the thermostat.
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Sunday, February 12th, 2012 AT 9:35 AM

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