Noritz Combi Boiler Error Codes
Noritz combi boilers and tankless heaters show a numeric error code on the remote controller. Note the code and your model before calling.
This is not a DIY repair
Combi boilers are gas-fired appliances regulated under the BC Safety Standards Act. Opening the unit, touching the gas valve, or working on the flue without a valid BC gas-fitter licence is both unsafe and illegal. Diagnosing the fault is helpful — fixing it should always be left to a certified technician.
Call 778-909-5731Noritz fault codes (16)
10UrgentAir supply or exhaust blockage / combustion abnormality.11UrgentNo ignition.12UrgentFlame failure (flame loss).14UrgentOverheat protection activated.16UrgentOutgoing water over-temperature.29ModerateCondensate / neutralizer drain fault.31ModerateCombustion sensor fault.51UrgentGas solenoid valve fault.61UrgentCombustion fan fault.65ModerateWater flow control valve fault.66ModerateBypass flow control valve fault.71UrgentGas valve control circuit fault.72UrgentFlame sensing fault.90UrgentCombustion / exhaust abnormality.92LowNeutralizer replacement notice.99UrgentExhaust blockage / combustion shutdown.