BoilerFaultCodesWorcester Bosch E00-730 Fault Code
Also written as E00730 — same fault.
The Worcester Bosch E00-730 fault code means: your boiler has detected a problem with how it moves air and exhaust gases, which has caused it to shut down for safety.. It appears on 1 Worcester Bosch model in our database.
Technical description: Differential Air Pressure Switch Huba, Ref. 605.99482
What causes the Worcester Bosch E00-730 fault?
This fault occurs when the boiler's internal sensor fails to detect the correct airflow required to safely clear exhaust gases from the flues. The most common reasons include a blockage in the flue pipe, a buildup of debris in the small plastic tubes inside the casing, or an electrical failure within the air pressure switch itself.
This fault is more common during periods of high winds, which can create back-pressure in the flue and prevent the air pressure switch from closing correctly.
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 E00-730 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Worcester Bosch E00-730 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