Hello,
we have a new Vitodens 222-F gas heating system. During the recent cold snap (0 F outside) we found out the boiler temperature does not go above 165 F, no matter what heating curve settings are used. It does go to 190 F easily during in flue test mode, so it does not seem to be a combustion issue, but something to do with the programming. Our installer is puzzled and the house is very cold, even though the boiler is working all the time.
Any suggestions would be appreciated, thanks, AZ
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