BoilerFaultCodesWorcester Bosch FAIL POINT L Fault Code
Also written as FAILPOINTL — same fault.
The Worcester Bosch FAIL POINT L fault code means: your boiler has likely been left in a testing mode during a service, or it is struggling to control the temperature of your hot water properly.. It appears on 3 Worcester Bosch models in our database.
Technical description: Light indication during fault not covered by other details. Control board likely wet, damaged, or malfunctioning.
What causes the Worcester Bosch FAIL POINT L fault?
This fault usually happens if the boiler was accidentally left in a special diagnostic mode after a service, which prevents it from operating normally. It can also occur if the boiler's internal computer loses control over the hot water temperature, often due to a faulty sensor or a sticking gas valve. Essentially, the system has detected that it cannot safely regulate the heat and has shut down to protect itself.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Gas Safe Register →Worcester Bosch models that show the FAIL POINT L fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Worcester Bosch FAIL POINT L 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