2003 Cadillac DeVille DTS Q&A

2003 Cadillac DeVille DTS Question: air conditioning fan works only intermittenly

Why does air conditioning fan work intermittenly? IT comes on when right door slams or when going across a rough railroad track -
Answer 1
The blower motor brushes are worn and the slamming door causes them to make contact, at least temporarily. Just been through this exact scenario. -