i2 Low

Worcester Bosch i2 Fault Code

Also written as I2 — same fault.

The Worcester Bosch i2 fault code means: this code is simply a record showing the last technical error your boiler experienced; it is not currently reporting an active fault.. It appears on 1 Worcester Bosch model in our database.

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description: Last error - This can be viewed during normal operation. Displays the last diagnostic code with boiler status code.

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →

Worcester Bosch models that show the i2 fault code

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

Source

Worcester Bosch i2 fault code information on this page is sourced and cross-checked against the official Worcester Bosch service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026