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Boiler with display and pressure gauge
Boiler fault codes

Remeha boiler faults: fault codes, causes and parts (page 5 of 6)

Codes 601 to 750 of the 806 fault codes for Remeha. Looking for a specific code? Use the search on the first page.

Remeha boiler fault codes 601 to 750 of 806

The code list is split over 6 pages. Looking for a specific code? Use the search on the first page: it searches all 806 codes in one go.

CodeCause
E8Fan error: fan keeps running
E9Fan not running Fan continues to run
E9The water pressure is too low
E9The water pressure and/or water level are too low
E:00Electronic PCB PSU not connected
E:01Safety parameters not in order
E:02Short circuit in the boiler flow sensor
E:03Short circuit in the boiler flow sensor
E:04Boiler temp too low
E:05Boiler temp too high
E:06Short circuit in the flow pipe temperature sensor
E:07Short circuit in the return pipe temperature sensor
E:08Return temperature too low
E:09Return temperature too high
E:10Insufficient difference between flow and return temperature
E:11Too large a difference between flow and return temperature
E:12Maximum boiler temperature exceeded (limit thermostat STB)
E:145 failed burner starts
E:15If VPS switch present: 5 failed gas leak checks:
E:16Detection of a parasitic flame signal
E:17Gas valve fault
E:34The fan is not running at the correct speed
E:35Flow and return swapped
E:36The flame has gone out more than 5 times in 24 hours while the burner was running
E:37Communication interrupted with the electronic SU PCB
E:38Communication interrupted between the electronic PCU and SCU PCBs
E:39The BL input is open
E:40HRU/MVHR unit test error
No signalNo supply voltage:
H.00.42Pressure sensor open/defective or pressure too high
H.00.81Thermostat disconnected
H.00.81RoomTempMissing The room temperature sensor was expected but has not been detected
H.01.00Comm. error Communication error occurred
H.01.00Temporary communication fault in the PCB
H.01.00Communication error occurred Communication error with the safety core: Restart the boiler Replace the CU-GH
H.01.05Maximum difference between flow temperature and return temperature
H.01.05Maximum temperature difference between flow and return reached.
H.01.05Max Delta TF-TR Maximum difference between flow temperature and return temperature
H.01.06Maximum difference between heat exchanger temperature and flow temperature
H.01.08CH TempGrad level 3 Maximum central heating temperature gradient level 3 exceeded
H.01.08Flow temperature rises too quickly in heating mode.
H.01.08Delta T Max 3
H.01.09Gas pressure switch
H.01.09Gas pressure switch Gas pressure switch
H.01.13Heat exchanger temperature has exceeded the maximum operating value
H.01.14Max T Flow The flow temperature has exceeded the maximum operating value
H.01.14Maximum flow or return temperature reached.
H.01.14The flow temperature has exceeded the maximum operating value
H.01.15Max T Flue gas The flue gas temperature has exceeded the maximum operating value
H.01.15The flue gas temperature has exceeded the maximum operating value
H.01.18Water does not flow through (temporary).
H.01.21Flow temperature rises too quickly during domestic hot water mode
H.01.21DHW TempGradLevel3 Maximum DHW temperature gradient Level3 exceeded
H.01.21Heat exchanger temperature rises too quickly
H.02.00Reset carried out
H.02.00Reset in progress Reset in progress
H.02.00Reset procedure in progress.
H.02.02Waiting for configuration settings (CN1, CN2) to be entered.
H.02.02Waiting for config. no. Waiting for configuration number
H.02.02Waiting for configuration number
H.02.03Configuration error
H.02.03Config. error Configuration error
H.02.03Configuration settings (CN1, CN2) not entered correctly.
H.02.04The PCB settings cannot be read
H.02.04Parameter error Parameter error
H.02.04Parameter error
H.02.05CSU does not match CU type
H.02.05CSU & CU do not match CSU does not match CU type
H.02.05The settings memory is not compatible with the PCB type of the boiler
H.02.07Low pressure in the heating circuit (water must be topped up).
H.02.09Partial shutdown of the boiler (frost protection function active)
H.02.09Lockout of central heating and hot water operation due to the external blocking input being opened
H.02.09Partial lockout Partial lockout of the appliance detected
H.02.10Appliance lockout due to the external blocking input being opened
H.02.10Full lockout Full lockout of the appliance detected
H.02.10Complete shutdown of the boiler (frost protection function not active)
H.02.12Lockout due to the external release contact for burner start not closing
H.02.12Release signal Release signal input from the control unit of the external appliance environment
H.02.15External CSU time-out
H.02.31Lockout after power failure. Water pressure lower than required filling pressure. Enable automatic filling.
H.02.36Functional device is disconnected
H.02.38No water hardness
H.02.40Function not available
H.02.55Invalid or missing device serial no.
H.02.70Test of external heat recovery unit failed
H.02.70External unit heat recovery test failed
H.02.70HRU test error External heat recovery unit test failed
H.02.79No device present on the system bus (cascade).
H.03.00No identification data for the boiler safety device.
H.03.00Parameter error Safety parameters level 2, 3, 4 are incorrect or missing
H.03.00Safety parameters level 2, 3, 4 not correct or missing.
H.03.01Lockout due to an internal communication error
H.03.01CU to GKR data error No valid data received from CU to GKR
H.03.02Lockout due to flame signal too low
H.03.02Temporary flame loss
H.03.02Flame loss detected: measured ionisation current is below limit
H.03.05Lockout due to internal fault of safety unit
H.03.05Internal lockout Gas valve control internal lockout occurred
H.03.05Mains supply voltage too low
H.03.17Lockout: the internal safety check is being carried out
H.03.17Safety check Periodic safety check is being carried out
H.03.254Unknown error
H.03.54Temporary flame loss Shutdown due to a mains supply voltage that is too low
H.10.00Flow temperature sensor group A open
H00.36Second return temperature sensor has been removed or measures a temperature below the range
H00.37Second return temperature sensor is short-circuited or measures a temperature above the range
H00.42Pressure sensor open/defective or pressure too high.
H00.42Pressure sensor open/defective or pressure too high
H00.81Ambient temperature sensor missing
H00.81Ambient temperature sensor missing.
H01.00Temporary communication fault in the PCB.
H01.00Temporary communication fault in the PCB
H01.00Communication error occurred
H01.05Maximum temperature difference between flow and return reached
H01.05Maximum temperature difference between flow and return reached.
H01.06Maximum difference between heat exchanger temperature and flow temperature
H01.08Flow temperature in the heating system rises too quickly.
H01.08Flow temperature in the heating system rises too quickly
H01.14Maximum flow or return temperature reached
H01.14Maximum flow or return temperature reached.
H01.18Water does not flow through (temporary).
H01.18Water does not flow through (temporary)
H01.21Flow temperature rises too quickly during domestic hot water mode.
H01.21Flow temperature rises too quickly during domestic hot water mode.
H02.00Reset procedure in progress.
H02.00Reset procedure in progress
H02.02Waiting for configuration settings (CN1, CN2) to be entered
H02.02Waiting for configuration settings (CN1, CN2) to be entered.
H02.03Configuration settings (CN1, CN2) not entered correctly.
H02.03Configuration settings (CN1, CN2) not entered correctly
H02.04PCB settings cannot be read
H02.04PCB settings cannot be read.
H02.05The settings memory is not compatible with the PCB type of the boiler.
H02.07Low pressure in the heating circuit (water must be topped up).
H02.12Fault of the input that blocks boiler release.
H02.12Fault of the input that blocks boiler release
H02.31The appliance requires automatic filling of the system due to low pressure
H02.31The appliance requires automatic filling of the system due to low pressure.
H02.38Maximum number of automatic filling cycles reached.
H02.38Maximum number of automatic filling cycles reached
H02.70Test of external heat recovery unit failed
H02.70External heat recovery unit test failed.
H03.00No identification data for the boiler safety device.
H03.01Communication error in comfort software (internal fault in boiler control PCB).
H03.01Communication error in comfort software (internal fault in boiler control PCB).
H03.02Flame temporarily lost.
H03.02Flame temporarily lost
H03.05Internal stop
H03.05Internal stop.
H03.08False flame.

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