What does Potterton E110 mean?

The boiler has overheated and tripped — often a stuck pump or trapped air.

How do I fix Potterton E110?

Try first: Check the pressure gauge reads about 1–1.5 bar; Bleed your radiators to clear trapped air; Press reset once. If that doesn't clear it, the likely part is Pump or thermostat.

Potterton E110 Fault — What It Means & Fix Cost

⚠ This is the likely cause from the code — a Gas Safe registered engineer confirms it on site. If you can smell gas, stop and ring 0800 111 999.

✅ Try these first — they're free

Often clears it without a callout:

Check the pressure gauge reads about 1–1.5 bar
Bleed your radiators to clear trapped air
Press reset once

🔧 If that doesn't fix it

The likely cause is one of these — the engineer confirms which:

Most likely part: Pump or thermostat

Fixed repair price

£456

Inc. VAT — part & labour, no surprise callout fee. You only pay if you go ahead.

A vetted Gas Safe engineer who covers your postcode will call you back to arrange the repair. No callout fee — you only pay if you go ahead.

Other Potterton fault codes

Potterton E09Gas valve wiring or connection fault.…Potterton E10Outdoor (external) sensor fault.…Potterton E109Poor circulation around the system.…Potterton E117System pressure is too high (over about 2.9 bar).…

Potterton E110 — what it means

✅ Try these first — they're free

🔧 If that doesn't fix it

Other Potterton fault codes

Book your repair