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Q:

no heat or AC from the panel, only the floor or windshield. on 2003 Cadillac DeVille

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
on heat or AC from panel
(1) Answer
could be a vacumm behind or under dash disconnected