Potterton · Promax Combi HE Plus

E133 boiler fault code

Promax Combi 24/28/33 HE Plus A

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What E133 means

E133 means the boiler could not establish or detect a flame. The manual lists an interrupted gas supply, failed ignition or a flame that was not detected as possible causes.

Gas Safe engineer: If the boiler does not relight after one reset or E133 returns, contact a Gas Safe registered engineer to investigate the ignition, gas supply or flame-detection fault. Do not open the casing or adjust gas components.

A boiler fault code alone is not a gas or carbon-monoxide emergency. If you smell gas, a CO alarm sounds, anyone feels unwell, or there is an unsafe flame, leave and call 0800 111 999 from outside.

Safe check

Do not reset if you smell gas, a CO alarm sounds, anyone feels unwell or there is an unsafe flame — leave and call 0800 111 999 from outside. Otherwise, check that the gas supply has not been switched off. You may try one reset by holding the selector at Reset for at least 5 seconds, as the user guide says. If it does not relight or E133 returns, stop and contact a Gas Safe registered engineer. Do not open the casing.

When to contact an engineer

If the boiler does not relight after one reset or E133 returns, contact a Gas Safe registered engineer to investigate the ignition, gas supply or flame-detection fault. Do not open the casing or adjust gas components.

Source and provenance

Potterton Promax Combi HE Plus A User Guide · UK Comp No 5114443 Iss 17 (4/13) · Table of Error Codes, printed p. 8; §5.3 Fault Indication, printed p. 8 · manufacturer document, hosted by gentoogroup.com
user guide
UK Comp No 5114443 Iss 17 (4/13)

Renting? Report it to your landlord or housing provider first. They are responsible for gas safety and boiler repairs, and the repair should not cost you.

Did this fix it?

After: Reset the boiler once