Noritz wall hung hot water

john_83

Wondering if anyone has had problem with fintubes in unit freezing up . Had one freeze up and burst the unit has automatic damper and heater to prevent people from noritz cant figure it out. never lost power thanx john

Ed_26

coil freeze

Check the building for depressurization: even with a damper, it can leak enough to freeze under the right conditions. ie: make-up air screen plugged, exhaust systems left running overnite, etc. etc.