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Bosch boiler plumbed backwards
Hello, I have a Bosch Greenstar 131 floor standing boiler that was installed last fall. The unit has not been keeping up with the cold temps this winter and I just noticed that the radiator return line is plumbed to the boiler port marked "supply" and the radiators are being fed from the boiler port marked "return". Can anyone tell me what the detrimental effects of this would be? Lower temp to the baseboard heating? Damage to the boiler?