Question about 1986 Buick LeSabre

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1986 buick lasabre heater fan workes, but no heat at all

Heater controls seem to work all right, but get no heat at all for heater or defroster

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Could be a vacuum switch on the heater hose. The heater hoses are the small hoses ( 1inch, usually black or red) that run from the motor to the inside of the car. They should be warm when the car is up to temperature.

The vac switch controls the water flow to the heater core. If the vac valve is bad or the vac line that feeds it is bad it will not allow water to enter the heater core.

Could be a plugged heater core too.

Check the water level in the radiator as well. If the engine is low on water often the first to go is the heater.

Posted on Dec 20, 2008

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Posted on Jan 02, 2017

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