A.O. Smith tankless
0 field manuals · 14 error codes · 0 guides
A.O. Smith tankless water heaters
All water heaters →Error codes
101 Abnormal combustion warning111 Ignition failure121 Flame loss311 Outlet thermistor failure321 Inlet thermistor failure331 Mixing thermistor failure391 Air-fuel ratio rod failure441 Flow sensor failure551 Gas solenoid valve failure611 Fan motor fault701 Computer board failure721 False flame detected741 Remote controller communication …991 Improper combustion
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