Question about 1999 Chevrolet Cavalier
The heater core valve or the heater core itself may be damaged.check the hoses that run to the heater core they should be warm after running the heater full blast. if one of the hoses is hot. The valve may be plugged. the heater core valve is connected to the hose itself. It can be an electronic valve or vacuum controled valve.If it is a vacuum controlled valve you can manually open it and close it . If it's plugged by debris from dirty coolant or sludge it can get clogged. If it is an electronic valve, check it with a volt meter and see if current is flowing through it. if it is not the valve has to be replaced. if it is not the valve, it is the heater core that is leaking or has build up and has clogged.Needs to be replaced.
Posted on Nov 20, 2008
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Posted on Jan 02, 2017
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