I have heat when sitting still but not when I'm driving. I just got a new head gasket and radiator but still this problem.
TAKE IT TO WHO EVER WORKED ON IT AGAIN..
Sounds like there is still some air in the cooling system. Did you do the head gasket and radiator your self ? If not take back to whom ever did the job. If you did your self post back.
It just may be low on coolant, check the coolant level.
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