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Potterton Fault Codes

Welcome to the fault-codes section of this site. The following table or page contains the information required to help repair and diagnose the fault codes being shown on the boiler display. You may be guided through the fault finding sequence or steps, for rectifying your boiler with this fault code. Suggested repair solutions may be provided by a link to a repair page. NB Some fault codes are only applicable to a specific range of boilers only.

Potterton Fault Codes

Below is a table of Potterton fault codes. Please note some codes may be applicable to certain models or boiler types.

Fault CodeRepairPossible CauseSolutionResources
E09LinkGas valve wiring fault
E10LinkOutdoor sensor error
E15LinkGas valave connection fault
E20LinkCentral heating thermistor sensor fault
E28LinkFlue thermistor fault
E40LinkCentral heating return thermistor fault
E50LinkDomestic hot water sensor fault
E53LinkFlue obstruction
E55LinkCalibration required
E78LinkWater pressure sensor fault
E83 / 84 / 85 / 86 / 87LinkNo communication between room controller and boiler
E92LinkCombustion test alarm during auto-setting
E109LinkPoor circulation
E110LinkBoiler overheat tripped
E117LinkSystem pressure high (>2.9 bar)
E118LinkSystem pressure low
E119LinkSystem pressure low
E125LinkPrimary water circulation fault
E128LinkLoss of flame during operation
E129LinkLoss of flame during calibration
E130LinkFlue thermostat sensor tripped (lockout)
E131LinkFlue overheat lockout
E133LinkIgnition fault
E135LinkInternal error
E151LinkPCB error
E152LinkPCB error
E154LinkPrimary flow fault
E160LinkFan fault
E161LinkFan fault
E164LinkDomestic hot water sensor error (In the ROI this is a heating flow switch error)
E167LinkPCB fault
E168LinkPCB lock out
E270LinkDry fire
E317LinkWrong power supply (HZ)
E321LinkHot water thermistor fault
E384LinkFlame detected when gas valve off (false flame)
E385LinkLow voltage (less than 195v)

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