BoilerFaultCodesWorcester Bosch 6.8 Fault Code
Also written as 68 — same fault.
The Worcester Bosch 6.8 fault code means: your boiler is confused by how long it is taking to heat your hot water and is stuck in a constant cycle.. It appears on 2 Worcester Bosch models in our database.
Technical description: Constant hot water cycle time
What causes the Worcester Bosch 6.8 fault?
This fault occurs when the boiler detects that it is taking far too long to reach the required temperature for your hot water, causing it to get stuck in a repetitive heating loop. It is usually caused by a faulty sensor sending incorrect temperature readings to the brain of the boiler or a mechanical part failing to direct heat to the water properly. In some cases, the main control board may simply be misinterpreting the data it receives from the system.
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 6.8 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Worcester Bosch 6.8 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