Hello
My heater in 1987 C4 Corvette is no working. I live in France and it is still cold here. Fan comes on but no heat? I check heater core and it does get warm. So how come no heat in car?

thank you very much

Pierre

Hello Pierre
You said the heater core is warm. It should get very hot. On that year the heater control valve is a big problem. They rust away from the in side out and stopping most of hot water from going to the heater core but not all ( warm ). And easy test is to put vacuum to the heater control valve and see if it will close. Then no vacuum should open. One thing if your car is low on coolant the heater will not work check this first.
David Steele