Buick Century Rear Window Defroster Switch

I Have A 2003 Buick Century My Heater Core Is Not Leaking But My Heat Or Ac Does Not Come On At All But My Rear Defrost Button Works For The...

Hi..just Bought Car..rear Defogger Not Working..light Goes On When Button Pushed..fuse Ok..what Next? Any Simple Fix Like A Relay ,bad...

Problem Is I Checked All The Fuses(i Have No Owners Manual ), The Rear Window Switch Does Make A Click Sound And Sounds Like It Works But...