How much does it cost to fix Potterton error code E110?

Typical repair cost for the Potterton E110 fault is £90-250 including labour.

E110 High

Potterton E110 Fault Code

Q: What does the Potterton E110 fault code mean?

Your boiler has become too hot and has shut itself down for safety, likely because the water isn't moving through the system correctly.

The Potterton E110 fault code means: your boiler has become too hot and has shut itself down for safety, likely because the water isn't moving through the system correctly.. It appears on 14 Potterton models in our database.

Technical description: Boiler overheat tripped

What causes the Potterton E110 fault?

This fault occurs when the water inside the boiler exceeds a safe temperature limit, triggering a safety sensor to cut the power. The most common reason is that the internal pump has failed or seized, meaning the heat generated by the burner cannot be carried away to your radiators. It can also be caused by a blockage in the pipework or a build-up of air preventing the water from circulating properly.

This fault is frequently seen in autumn when heating systems are turned back on after being idle all summer, which can cause the internal pump to stick or seize.

Typical repair cost £90-250 (including labour)

DIY fix possible

Check that your radiator valves are open to allow water to flow.Check the boiler pressure gauge and top up to 1.5 bar if it is too low.Press the Reset button once to see if the system restarts.

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Potterton models that show the E110 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Potterton E110 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