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Hello, my name is ***** ***** I look forward to helping you!
Is this a new install or and old install with a new problem?
The manual states that you either have overlapping times or no end time programmed. If neither of these two or the issue I'd have to guess it PCB problem that would require replacement of the controller
Do you have the manual? Would you like a link to it?
Good. You are on the ball. If you are satisfied with my help I'd appreciate a positive rating. Best of luck sir.
Do you need further assistance or are you satisfied with my answer?