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Buderus G115 heating up radiators periodically even on summer setting
We are sweltering in Norway right now, Oslo area. I set the Buderus G115 to “summer” (been doing this for years and have checked and all is correct) which is supposed to only heat up our water for faucets, bath/shower, and no house heating. It does say on Wednesday’s it will circulate water through the system at noon, for a few minutes.
But we first noticed one evening, I heard the slight knocking as it warmed up, and it was eight p.m., and then also in the morning. We even have the thermostat also set to 15 deg. Celsius, but the thermostat is supposed to be ignored in summer setting. One smaller, longer radiator is noticeably warm couple of times a day. We have only one zone, it’s not multiple, but so weird that the other radiator is not warm.
We are up at 30 deg Celsius, and the radiator warming up is not helping, also the cost.
Every hear of this problem before? I see the LED with the parasol icon, is on, the panel says summer (and I have no temp set on it either but did briefly try 17 degrees, but it still happens).