Mechanics

HAD AIR ON NOW NO HEAT

2004 Chevrolet Blazer • 6 cylinder 4WD Automatic • 75,345 miles

I was useding my air conditioner in the pass and when it got cold I had no heat my I think condenser and air con. Hose would be dripping water with the heat on is there a relay or vacuum to switch it back n fore I hope u can help
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John n mary
January 17, 2011.



The heater won't cause condensation; thus, there will be no water dripping. Make sure the radiator is clean and full. If both heater core hoses get hot, make sure the blend door is working. If only one gets hot, try flushing the heater core.



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