326 Medium

Worcester Bosch 326 Fault Code

The Worcester Bosch 326 fault code means: your boiler is having trouble sensing the temperature of your hot water cylinder, which means it may struggle to provide consistent hot water.. It appears on 1 Worcester Bosch model in our database.

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

Technical description: Storage-NTC defect
Typical repair cost £120-220 (including labour)

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 326 fault code

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

Source

Worcester Bosch 326 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