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Thank you Labman. I had only the wiring diagram/instruction they left in the attic when I moved in. Did not have anything else :o . I will try to contact Honeywell today to see how it goes. I...

Thank you wheatnbarley24 & Labman for quick response.

I wouldn't mind if I get my hands dirty. By the way, I love to learn to fix things and do it myself.
To get started, how/where do I check...

Hi Labman,

I just got the same problem as Brad, except mine is Honeywell with 2 zones. I went to attic and checked out the system: when I turned on zone one (or two) with AC or FAN, they worked...