1999 Chevrolet Blazer Temp Gage Steady About 200 Deg Heater Intermittent

1999 CHEVROLET BLAZER
103,000 MILES
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Temp gage steady about 200 deg. Heater is intermittent varying from cool to normal regardless of dash knob setting. What could cause this?
Dec 30, 2012 at 1:30 AM
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