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

2002 CHEVROLET SUBURBAN
145,000 MILES
Avatar
MICXIE
  • MEMBER
  • 14 POSTS
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.
Feb 11, 2012 at 6:11 PM
Advertisement
Avatar
RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Check the air blend door/actuator-could also be the water pump impeller
Feb 11, 2012 at 6:14 PM
Avatar
MICXIE
  • MEMBER
  • 14 POSTS
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.
Feb 11, 2012 at 7:28 PM
Avatar
RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Start by checking the thermostat
Feb 11, 2012 at 10:49 PM
Avatar
MICXIE
  • MEMBER
  • 14 POSTS
Thanks again Rasmataz Soon as the weather warms a bit Ill change the thermostat.
Feb 12, 2012 at 9:35 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.