Buderus Combi Boiler Error Codes
Buderus Logamax combi boilers display error codes on the control panel. Record the code before calling your technician. Buderus is part of the Bosch group.
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 778-909-5731Buderus fault codes (12)
E1ModerateLow water pressure / system pressure fault.E2UrgentIgnition failure / no flame detected.E3UrgentFlame loss during operation.E4UrgentOverheating / high-limit thermostat tripped.E5UrgentFan fault / speed outside permitted range.E6UrgentFlue gas / exhaust temperature high.E7ModerateFlow temperature sensor fault.E8ModerateReturn temperature sensor fault.E9ModerateDHW temperature sensor fault.EAModerateExternal limit/thermostat open.ECUrgentCirculation fault / no flow detected.EFModerateInternal control board fault.