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Potterton Fault Codes
Select a fault code to see its meaning, common causes and how to fix it.
- E09 The E09 fault code on a Potterton boiler indicates that the boiler's control board has detected a problem with the gas… Read more →
- E10 The E10 code on a Potterton boiler indicates a problem with the outdoor temperature sensor. This sensor — fitted to an… Read more →
- E109 The E109 code appears on Potterton boilers when the appliance detects inadequate water movement through the heating… Read more →
- E110 The E110 code appears on your Potterton boiler when the internal safety thermostat has tripped because the boiler… Read more →
- E117 The E117 code appears on Potterton boilers when the system water pressure has climbed above approximately 2.9 bar —… Read more →
- E118 The E118 code on a Potterton boiler indicates that the central heating system pressure has fallen to a level too low… Read more →
- E119 The E119 code appears on Potterton boilers when the system water pressure has dropped too low — typically below 0.5 bar… Read more →
- E12 The E12 code appears on several Potterton boiler models and relates to a water circulation problem detected by the… Read more →
- E125 The E125 code appears on Potterton boilers when the appliance detects a problem with water circulation through the… Read more →
- E128 The E128 code appears on Potterton boilers when the appliance has lost its flame — or failed to establish one — during… Read more →
- E129 The E129 fault code on Potterton boilers signals a flame detection problem — specifically, that the boiler is either… Read more →
- E13 The E13 code on a Potterton boiler indicates a flue gas or combustion safety fault. The boiler's control system has… Read more →
- E130 The E130 code appears on Potterton boilers when the flue overheat safety thermostat trips, forcing the boiler into a… Read more →
- E131 The E131 fault code on a Potterton boiler signals a flue overheat lockout. In plain terms, the boiler has detected that… Read more →
- E133 The E133 code appears on Potterton boilers — often displayed as 'E1' alternating with '33' — when the boiler has… Read more →
- E134 The E134 fault code appears when the boiler's PCB (printed circuit board) has sent the signal to open the gas valve,… Read more →
- E135 The E135 code indicates an internal interruption of the gas supply — meaning the boiler itself has detected that gas is… Read more →
- E15 The E15 code on a Potterton boiler signals a problem with the gas valve connection. In plain terms, the boiler's… Read more →
- E151 The E151 code indicates that the boiler's PCB (Printed Circuit Board) has detected an internal fault — specifically… Read more →
- E152 The E152 code indicates that the boiler's PCB (Printed Circuit Board) has detected a second-type internal fault within… Read more →
- E154 The E154 code on a Potterton boiler indicates a primary flow fault — the boiler's control system has detected that… Read more →
- E160 The E160 code appears when the boiler's control board detects a problem with the fan system and responds by locking the… Read more →
- E161 The E161 code signals a fan fault on Potterton boilers, closely related to the E160 code which covers the same… Read more →
- E163 The E163 fault code on a Potterton boiler indicates a problem with the Domestic Hot Water (DHW) NTC (Negative… Read more →
- E164 The E164 code appears on Potterton boilers when the control board detects a problem with the domestic hot water (DHW)… Read more →
- E167 The E167 code on a Potterton boiler signals that the boiler's Printed Circuit Board (PCB) has detected an internal… Read more →
- E168 The E168 code appears on Potterton boilers when the appliance has entered a lockout state — meaning it has shut itself… Read more →
- E193 The E193 code on a Potterton boiler signals a circulation problem — the boiler has detected that hot water is not… Read more →
- E20 The E20 code on a Potterton boiler signals that the control board has detected an unexpected or out-of-range reading… Read more →
- E270 The E270 code on a Potterton boiler signals a 'dry fire' condition — meaning the boiler attempted to ignite or run but… Read more →
- E28 The E28 code on a Potterton boiler indicates a fault with the flue thermistor — the sensor responsible for monitoring… Read more →
- E317 The E317 code means the boiler's control board has detected that the incoming electrical supply frequency is outside… Read more →
- E321 The E321 code appears on Potterton boilers when the control board detects an issue with the heating NTC (negative… Read more →
- E384 The E384 fault code appears on Potterton boilers when the PCB detects a flame signal at a point when the gas valve… Read more →
- E385 The E385 fault code indicates that the electrical supply voltage reaching your Potterton boiler has fallen below 195V —… Read more →
- E40 The E40 code on a Potterton boiler points to a problem with the central heating (CH) return thermistor — the sensor… Read more →
- E430 The E430 code on a Potterton boiler relates to the boiler's internal water pressure test routine. When E430 appears on… Read more →
- E50 The E50 code on a Potterton boiler points to a problem with the domestic hot water (DHW) NTC thermistor — the… Read more →
- E53 The E53 code on a Potterton boiler indicates that the appliance has detected a restriction or blockage in the flue —… Read more →
- E55 The E55 code on a Potterton boiler is the appliance's way of flagging that it needs recalibration. In plain terms,… Read more →
- E78 The E78 fault code on a Potterton boiler indicates that the boiler's control board is unhappy with the signal it is… Read more →
- E83 The E83 fault code on Potterton boilers signals a communication breakdown between the boiler and its room controller,… Read more →
- E84 The E84 code signals that your Potterton boiler has lost communication with an external control device — most commonly… Read more →
- E85 The E85 code on a Potterton boiler signals that the printed circuit board (PCB) has triggered a full safety lockout.… Read more →
- E86 The E86 code on a Potterton boiler signals a communication fault — meaning one or more components inside the boiler… Read more →
- E87 The E87 fault code on a Potterton boiler indicates that the boiler has lost communication with the room controller or… Read more →
- E92 The E92 code appears when a Potterton boiler runs its automatic combustion self-calibration routine and the results… Read more →