Potterton Assure Combi Boiler Error Codes

Assure Combi Boiler Error Codes

Error Code Possible fault
E09 Gas valve connection cable
E10 External probe fault
E12 Differential water flow switch fault (still open)
E13 Differential water flow switch fault (still closed)
E15 Gas valve command fault
E20 Central heating NTC fault
E28 Flue NTC fault
E40 Central heating return NTC fault
E50 DHW NTC sensor fault (tank boiler) (s.c.) OR DHW NTC sensor fault (tank boiler) (o.c.)
E83/E84/E85/E86/E87 No communication
E109 Pre-circulation fault
E110 i) Boiler max temperature exceeded for gradient (probable pump jammed or air in the circuit). OR ii) Boiler max temperature exceeded for overtemperature (probable pump jammed or air in the circuit). OR iii) Safety thermostat sensor tripped
E118 Primary system water pressure too low (< 0.5=””>
E125 Circulation fault (primary)
E128 Frequent flame failure (12 times)
E129 Safety error for frequently loss of flame with max correction during the ignition during Calibration Function
E130 Flue thermostat sensor tripped (lockout)
E133 Failure to light (could be a gas supply issue). Check that the gas supply is available. If possible try lighting a gas cooker or fire.
E134 Elapsed time gas valve open without gas (short request in a short period)
E135 Interuption of gas supply (internal error)
E154 Flow/return sensor temperature test
E160 Fan or fan wiring fault
E163 Domestic Hot Water NTC sensor fault (s.c.) OR Domestic Hot Water NTC sensor fault (o.c.)
E270 Circulation fault (dry fire)
E317 Wrong power supply electrical frequency (Hz)
E321 Hot water NTC fault
E384 False flame
E385 Under voltage
E430 Water pressure temporary test
E430 + Flame ‘crossed’ Water pressure test failed

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