1989 vette- no heat
If you have no heat, chances are that your heater core is clogged or dead. (How did you determine that the heater core was OK?) I my experience it was best to have the heater core replaced. I had a local Corvette shop do the work because it is a long tedious process that I would probably have screwed up. It set me back about $900.00 but the heater worked flawlessly afterwards.
Check the switch and the doors first before a major operation. Fuse operational? Start small and work into the big bucks.
how do you check the switch and what doors
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