I have a Baxi Megaflo boiler and two zones in my home. Since having two Nest Gen 3 thermostats installed my boiler pump now comes on every other day getting, two hours later every day and stays on for 2 hours if I don't turn it off. I have had the PCB in the boiler replaced to not avail. I have everything turned off as far as heating except the water which is linked to zone 1 which is set to come on for half and hour in the morning and evening( I did also turn this off for 4 days) I have also tried turning off and disconnecting each of the Nests and nothing has made any difference. As the boiler is just below my bed and I'm a light sleeper, I'm at my wits end with this coming on at 12.20, the 2.20 two days later, and 4.20 another 48hrs later and so on and so on. Help!!!
