E00-737 High

Worcester Bosch E00-737 Fault Code

Also written as E00737 — same fault.

The Worcester Bosch E00-737 fault code means: your boiler's burner has encountered a serious ignition or combustion failure, meaning it cannot safely light to provide heat or hot water.. It appears on 1 Worcester Bosch model in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Burner – Propane Aeromatic, Ref. AC 23/05 3585

What causes the Worcester Bosch E00-737 fault?

This fault occurs when the boiler attempts to ignite but fails to establish or maintain a stable flame. The most common reasons include a blockage in the burner assembly, a faulty gas valve preventing fuel flow, or worn-out ignition electrodes that can no longer create the required spark.

Typical repair cost £180-450 (including labour)

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 E00-737 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Worcester Bosch E00-737 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