2002 Chevy Blazer Intermittent heat during cold weather

2002 CHEVROLET BLAZER
100,000 MILES • 6 CYL • 4WD • AUTOMATIC
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BUTTONGIRL
  • MEMBER
  • 1 POST
Checked the coolant level initially, which ws low, and topped it off. Gauge was low initially, too. After adding fluid, the temp. came up to around 180, but intermittently the vent will put out cooler than usual air. Just checked the level, there is still an adequate level. What could be the problem? Thanks.
Dec 11, 2009 at 8:37 PM
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JACOBANDNICKOLAS
  • ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
If you are loosing heat and the engine temp is normal, chances are the heater core may be plugging. Have you tried to flush it?
Dec 21, 2009 at 1:31 PM
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