Error code

Worcester Bosch Boiler Fault Code 229

Last updated: 2 April 2026Boiler faults need a cautious approach

Quick answer

229

high severity

The boiler has overheated or hit a high temperature limit

First safe action

Allow the boiler to cool and consult the manual for any user checks that are explicitly permitted.

Meaning

Worcester Bosch boiler fault code 229 usually means the boiler has shut down because temperatures rose beyond the expected limit.

Likely causes

Poor water circulation
Pump issue
Sensor or overheat thermostat problem

Safe first checks

Allow the boiler to cool and consult the manual for any user checks that are explicitly permitted.
Check whether radiator valves and system pressure appear normal from the user controls.
Do not keep forcing resets if the boiler quickly overheats again.

How to reset

Reset the boiler only after it has cooled and any user-level checks are complete.
Stop and seek professional help if the code returns.

When to call an engineer

If the boiler overheats again after a single reset, arrange a qualified heating engineer.

Safety warning

Do not open the boiler casing or touch internal hot components. Persistent overheating needs professional attention.

Useful hub links

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233 for Worcester Bosch Boiler

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Relevant guides

Boiler Fault Codes: When to Stop and Call a Professional

Boiler issues need a more cautious approach than most white goods, especially where gas, combustion, or repeated lockouts are involved.

Frequently asked questions

Can I keep resetting a Worcester Bosch boiler with 229?+

No. If 229 returns after one standard user reset, stop there and arrange a qualified engineer if the manual gives no safe next step.

Is 229 something I can repair myself?+

Boiler faults should be treated cautiously. Stay within the user checks in the manual, and leave gas, combustion, and internal boiler repairs to a qualified professional.