BoilerFaultCodesWorcester Bosch 1070 Fault Code
The Worcester Bosch 1070 fault code means: your boiler is simply reminding you that its annual service is due soon to keep it running safely and efficiently.. It appears on 2 Worcester Bosch models in our database.
Technical description: Maintenance is due on <dd.mm.yyyy> please call your service engineer
What causes the Worcester Bosch 1070 fault?
This code is triggered by the boiler's internal calendar once a pre-set timeframe has elapsed since its last professional inspection. It is not an mechanical failure, but rather a programmed reminder that the internal components need to be checked and cleaned to maintain efficiency. The code appears automatically to ensure the appliance continues to meet safety standards and remains within its warranty terms.
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 1070 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Worcester Bosch 1070 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