1999 Chevy S-10 heater not working but the blower still wor

1999 CHEVROLET S-10
104,000 MILES • 4 CYL • 2WD • MANUAL
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TINKGUFF
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  • 1 POST
my heater is not working but the blower is working but blowing cold air. i saw the raditator had fluid but if that is the problem what else might i check
Jan 29, 2009 at 1:33 PM
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2CARPRO JACK
  • ✓ASE Certified Mechanic
  • 11,533 POSTS
  • ASE Certified Mechanic
See if the heater hoses get hot. If only one is hot, you have a restriction in the heater core, if both are hot you may have an issue with the blend door under the dash
Jan 29, 2009 at 2:19 PM
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ISHEE77
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  • 20 POSTS
also, check the temperature gauge and see if the engine is running hotter than normal, the thermostat may not be opening correctly or all the way.
Jan 30, 2009 at 1:14 AM
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