Lennox GCWB95W-150 Error Codes

Equipment type not specified · Hydronic Heating

Model numbers in this family: GCWB95F-150, GCWB95W-150, GCWB95W-205

• 09 Gas valve connection fault.
• 10 Outdoor sensor fault .
• 109 Precirculation alarm (temporary fault).
• 110 Safety thermostat tripped due to over temperature (probable blocked pump or air in…
• 118 Hydraulic pressure too low.
• 125 No circulation safety trip (control performed via temperature sensor).
• 128 Loss of flame.
• 130-131 Flue NTC sensor tripped due to over temperature.
• 133 Ignition failure (5 attempts).
• 134 Gas supply valve blocked.
• 135 Internal error.
• 15 Gas valve error.
• 160 Fan fault.
• 162 Flue pressure switch (contact open)
• 20 Central Heating NTC sensor fault.
• 28-29 Flue NTC heat exchanger sensor fault
• 317 Incorrect power supply frequency.
• 321 NTC domestic hot water sensor faulty.
• 384 Fault flame (parasitic flame).
• 385 Input voltage too low.
• 40 Return NTC sensor fault.
• 53 Obstruction in flue pipe.
• 55 PCB not programmed.
• 83-84-85 86-87 Communication problem between boiler board and control unit. Probable short circuit on…
• 98 Internal error.

Reference only. Confirm against the manual for your exact model. Data release 105f66ecb9e96e5dc473025d.