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John Bauernschmitt

John ... 10/17/2011

2000 Chevrolet Blazer LS 6 Cyl 4.30L

Engine

Why do I get NO HEAT, even when heat is turned up high and blower fan on high?

3 Answers


HouseCallAuto

HouseCallAuto 10/17/2011

Is the blower fan on or not? You have not made that crystal clear. You can have air blowing out the vents but still have NO HEAT. Or , You can have no air blowing out the vents at all and still say I have NO HEAT.

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HouseCallAuto

John Bauernschmitt 10/18/2011

The heat dial is turned up high and the blower fan is turned on and working ( blowing air properly at any setting.)

HouseCallAuto

HouseCallAuto 10/18/2011

If turning the hot - cold knob seems to have no affect at all then your cause is likely a bad blend door actuator that is stuck in the cold position.

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HouseCallAuto

HouseCallAuto 10/18/2011

Sometimes smacking the black plastic heater box will cause it to become unstuck and start working.

cowboygordon

cowboygordon 10/18/2011

heater coil is out

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