Smell gas? Leave the property and call the National Gas Emergency line on 0800 111 999

E110

Potterton fault code

Potterton E110: overheat: the safety thermostat has tripped

Engineer only

The boiler got too hot. Baxi's table, covering Potterton Assure, lists a jammed pump or air in the system as likely causes.

What you can safely do

There is nothing you can safely do yourself with this one. Leave the boiler off and book an engineer.

Find a Gas Safe engineer near you Opens the official Gas Safe Register search.

Applies to: Potterton Assure (in Baxi's fault table). Codes can differ between models, so check your manual.

From Potterton's own fault tables. Your model name is usually on the front of the boiler or in the user manual.

Model	Meaning	Causes listed for engineers
Potterton Assure (in Baxi's fault table)	Boiler maximum temperature exceeded for gradient, or safety thermostat sensor tripped	Probably the pump is jammed or there is air in the circuit

Can I reset E110?

Repeatedly resetting an overheat fault isn't safe. Book an engineer.