Cause of no heat in 98 Cadillac Deville. Blower works fine. on 1998 Cadillac DeVille

The blower works fine in all positions. No heat however. What is the fix?

Get Your Car Fixed at a RepairPal Certified Shop.
We certify shops based on expertise, quality work, and verified customer reviews
1 answer
ck heater control valve operation and make sure both hoses to heater core are hot