Potterton Boiler Error Codes
If you’re experiencing an issue with your Potterton Boiler, use our Potterton Boiler Error Codes section to search by Boiler Make and Error Code to find out what the fault is.
Please enter the model name and error code:
Promax Combi, System and Store Boiler Error Codes
Error Code: E10
Possible Cause: Outdoor sensor error
Error Code: E120
Possible Cause: Central heating thermistor sensor fault
Error Code: E28
Possible Cause: Flue thermistor fault
Error Code: E50
Possible Cause: Domestic hot water sensor fault
Error Code: E110
Possible Cause: Boiler overheat tripped
Error Code: E119
Possible Cause: System pressure too low
Error Code: E125
Possible Cause: Primary water circulation fault
Error Code: E130
Possible Cause: Flue thermostat sensor tripped (lockout)
Error Code: E131
Possible Cause: Flue overheat lockout
Error Code: E133
Possible Cause: Ignition fault
Error Code: E151
Possible Cause: Printed circuit board (PCB) error
Error Code: E152
Possible Cause: PCB error
Error Code: E160
Possible Cause: Fan fault
Error Code: E161
Possible Cause: Fan fault
Error Code: E164
Possible Cause: Domestic hot water sensor error – could be a heating flow switch error)
Error Code: E167
Possible Cause: Printed circuit board (PCB) fault
Error Code: E168
Possible Cause: Printed circuit board (PCB) lockout
Error Code: E193
Possible Cause: Circulation issue
Potterton Promac Ultra, Gold/Titanium Combi & System Boiler Error Codes
Error Code: E09
Possible Cause: Gas valve wiring fault
Error Code: E10
Possible Cause: Outdoor sensor error
Error Code: E15
Possible Cause: Gas valve connection fault
Error Code: E20
Possible Cause: Central heating thermistor sensor fault
Error Code: E28
Possible Cause: Flue thermistor fault
Error Code: E40
Possible Cause: Central heating return thermistor fault
Error Code: E50
Possible Cause: Domestic hot water sensor fault
Error Code: E53
Possible Cause: Flue obstruction
Error Code: E55
Possible Cause: Calibration required
Error Code: E78
Possible Cause: Water pressure sensor fault
Error Code: E83 / 84 / 85 / 86 / 87
Possible Cause: No communication between room controller and boiler
Error Code: E92
Possible Cause: Combustion test alarm during auto-setting
Error Code: E109
Possible Cause: Poor circulation
Error Code: E110
Possible Cause: Boiler overheat tripped
Error Code: E117
Possible Cause: System pressure too high (>2.9 bar)
Error Code: E118
Possible Cause: System pressure too low
Error Code: E125
Possible Cause: Primary water circulation fault
Error Code: E128
Possible Cause: Loss of flame during operation
Error Code: E129
Possible Cause: Loss of flame during calibration
Error Code: E130
Possible Cause: Flue thermostat sensor tripped (lockout)
Error Code: E133
Possible Cause: Ignition fault
Error Code: E135
Possible Cause: Internal error
Error Code: E154
Possible Cause: Primary flow fault
Error Code: E160
Possible Cause: Fan fault
Error Code: E270
Possible Cause: Dry fire
Error Code: E317
Possible Cause: Wrong power supply (HZ)
Error Code: E321
Possible Cause: Hot water thermistor fault
Error Code: E384
Possible Cause: Flame detected when gas valve off (false flame)
Error Code: E385
Possible Cause: Low voltage (less than 195v)
Potterton Assue Combi And System Boiler Error Codes
Error Code: E09
Possible Cause: Gas valve connection cable fault
Error Code: E10
Possible Cause: External probe fault
Error Code: E12
Possible Cause: Differential water flow switch is still open
Error Code: E13
Possible Cause: Differential water flow switch is still closed
Error Code: E15
Possible Cause: Fault with the gas valve command
Error Code: E20
Possible Cause: Central heating negative temperature coefficient (NTC) fault
Error Code: E28
Possible Cause: Flue negative temperature coefficient (NTC) fault
Error Code: E40
Possible Cause: Central heating return negative temperature coefficient (NTC) fault
Error Code: E50
Possible Cause: Domestic hot water (DHW) negative temperature coefficient (NTC) sensor (tank boiler) (s.c) or DHW NTC sensor (tank boiler) (o.c.) Fault
Error Code: E83 / E84 / E85 / E86 / E87
Possible Cause: Communication error
Error Code: E109
Possible Cause: Pre-circulation fault
Error Code: E110
Possible Cause: Boiler Max temperature exceeded for gradient (or overtemperature) Probable pump jammed or air in the circuit or Safety thermostat sensor tripped
Error Code: E118
Possible Cause: Primary system water pressure too low
Error Code: E125
Possible Cause: Primary circulation fault
Error Code: E128
Possible Cause: Flame failure (12 times)
Error Code: E129
Possible Cause: Frequent loss of flame (safety error )
Error Code: E130
Possible Cause: Flue thermostat sensor tripped and locked out
Error Code: E133
Possible Cause: Possible gas supply issue (failure to light)
Error Code: E134
Possible Cause: Elapsed time gas valve open without gas
Error Code: E135
Possible Cause: Internal error (interruption of gas supply)
Error Code: E154
Possible Cause: Flow/return sensor temperature test
Error Code: E160
Possible Cause: Problem with fan (possible wiring fault)
Error Code: E163
Possible Cause: Domestic hot water (DHW) negative temperature coefficient (NTC) sensor fault (s.c.) or DHW NTC sensor fault (o.c.)
Error Code: E270
Possible Cause: Dry fire
Error Code: E317
Possible Cause: Wrong power supply (HZ)
Error Code: E321
Possible Cause: Hot water fault
Error Code: E384
Possible Cause: False flame
Error Code: E385
Possible Cause: Under voltage
Error Code: E430
Possible Cause: Water pressure test
Error Code: E430 + Flame crossed
Possible Cause: Water pressure test failed