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Hello all, I have a Potterton Suprima 70L and it is due to turn off and on 3 times a day. At 7.30am-9.30am, at 4pm-9pm and at 10pm-11pm. The problem is that it never turns on for the second interval but always works for the other two. When I set the mode to *on* it doesn't do anything, it...