BoilerFaultCodesPotterton E14 Fault Code
The Potterton E14 fault code means: your boiler has switched itself off because it has detected air bubbles trapped in the system or a lack of water flow, which is causing it to overheat too quickly.. It appears on 2 Potterton models in our database.
Technical description: Boiler shut down due to air passing through the pump or system not correctly vented (monitors temperature rise across the heat exchanger).
What causes the Potterton E14 fault?
This fault occurs when air enters the internal pipework or the water stops moving quickly enough, causing the heat exchanger to reach high temperatures too fast. The most common reason is trapped air bubbles passing through the pump or a pump that is beginning to fail and can no longer push water through the boiler effectively.
This fault is frequently seen in autumn when heating systems are turned back on after summer, as air often settles in the radiators and pipework during the period of disuse.
DIY fix possible
Check the pressure gauge and top up to 1.5 bar if it is lowTurn off the boiler and bleed all radiators to remove trapped airEnsure all radiator valves and the boiler isolation valves are fully openRestart the boiler to see if the code clears
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Gas Safe Register →Potterton models that show the E14 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Potterton E14 fault code information on this page is sourced and cross-checked against the official Potterton service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026