BoilerFaultCodesWorcester Bosch 1068 W Fault Code
Also written as 1068W — same fault.
The Worcester Bosch 1068 W fault code means: your boiler is struggling to work out how hard it needs to fire because the sensor that monitors the weather outside has stopped sending a signal.. It appears on 4 Worcester Bosch models in our database.
Technical description: Outside temperature sensor defective – check the connecting lead
What causes the Worcester Bosch 1068 W fault?
This fault occurs when the boiler loses communication with the sensor mounted on your external wall, which tells the system how cold it is outside. The most common reasons are the sensor's internal components failing due to water ingress or the thin communication wire being damaged or corroded over time.
This fault is often noticed during the first cold snap of autumn, as the boiler attempts to use the sensor to adjust its heating curve for the changing weather.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Worcester Bosch models that show the 1068 W fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Worcester Bosch 1068 W fault code information on this page is sourced and cross-checked against the official Worcester Bosch service / installation manuals for each affected model.
- Worcester Bosch Greenstar 2000 manual (PDF)
- Worcester Bosch Greenstar 8000 Life & Style manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026