from time to time the heat will work and no work.
i had a radiator replaced. Now cold weather is here. the heat is intermitant. A garage flushed heater core. got heat for 3 weeks. on cold morning engine up to temp. get cold air from blower. now today heat is working. it like comes and goes. is there a heater control valve to heater core. is this a electrical problem.? or do i flush heater core again? 3.5 liter engine was replaced by a used one.
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