353 Low

Worcester Bosch 353 Fault Code

The Worcester Bosch 353 fault code means: your boiler has temporarily paused itself because it hasn't had a proper break in the last 24 hours, so it is just waiting for a short cooling-off period to restart.. It appears on 3 Worcester Bosch models 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: -- Burn temporarily blocked due to no 20 minute continuous OFF time in last 24 hours.

DIY fix possible

Switch off the boiler at the electrical spur or fuse spurWait for 30 minutes to allow the boiler components to fully cool downSwitch the power back on and the boiler should resume normal operation automatically

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Worcester Bosch models that show the 353 fault code

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

Source

Worcester Bosch 353 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 31 August 2026