heater gets warm then gets cool then gets warm etc. changed thermostat, checked vacuum hoses has good vacuum, fluid is full ,what else can it be.
heater gets warm then gets cool then gets warm etc. changed thermostat, checked vacuum hoses has good vacuum, fluid is full ,what else can it be.
I would check the heater control valve and then replace the Radiator Cap. Sometimes a bad radiator cap won’t allow the system to build the right amount of pressure to function properly and since they are cheap enough, I would replace it. (if you have a tester, by all means test it but it is cheaper to by a new cap then to buy a tester)
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