Question about 1986 Volkswagen Golf

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1986 VW Golf heater blows cold air

I own 1986 VW Golf, no matter what position the heater control lever is it blows cold air out the vents. Sliding the temp control from cold to hot does not change the temperature either, always cold air.

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The heater in your car depends upon a flow of hot coolant going through the heater core in order to get hot air into the car. If the heater core is partially plugged, it will restrict the flow. If you have a head gasket that is putting exhaust into the cooling system, it will eventually get into the heater core. When this happens there is no coolant in the heater core to make the air warm. If the water pump vanes have corroded away the result will be very poor coolant circulation causing the heater to not blow hot air. If your car is equipped with a heater control valve that is not functioning properly, the coolant flow will be restricted. One or a combination of these factors is likely the culprit in your case.
if the car is not overheating, the thermostat is working fine.... replace or flush the heater core multiple times to try and eliminate sediment build-up.

Posted on Jan 14, 2009

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SOURCE: 1986 VW Golf - blows cold air out vents

add coolant....if that doesnt work...check the thermostat...then if its not that its the water pump

Posted on Jan 14, 2009

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Posted on Jan 02, 2017

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1986 VW Golf - blows cold air out vents


add coolant....if that doesnt work...check the thermostat...then if its not that its the water pump

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