Medium
305 on Worcester Bosch Junior 28i

Your boiler is temporarily paused while it finishes a period of providing hot water, but it has not yet switched back to heating mode.

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

The boiler is waiting for domestic hot water (DHW) operation to end

DIY fix possible

Check all hot water taps are fully closed and not drippingTurn off any showers or mixer taps that might be stuck openTry resetting the boiler if the code persists after taps are closedMonitor if the status clears after a few minutes of inactivity

Find a Gas Safe engineer
Search the official register →

Related fault codes

Related guides you might find useful