Question about 2001 Chevrolet S-10

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No hot air

Fan speeds work. temp gauge rises falls.

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The heater core may be plugged. Remove the hoses on the heater core. Flush the heater core out with water.

Posted on Jan 03, 2013

  • Paul Holtz Jan 03, 2013

    had replaced core a few years back, but yea, can pull hoses easy enough

  • jamiem1416
    jamiem1416 Jan 04, 2013

    The rising and falling temp would tell me, it's air locked or you have a sticking thermostat. A plugged heater core could do this too, but I'd try the thermostat first. If you remove the old one, and put it in a pot of boiling water, you will see the spring on the thermostat open the plunger which allows hot water to flow. If it sticks, this will cause your symptoms.. A rad flush wouldn't hurt as well. Hope I was of some help to you

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