What does the Worcester Bosch H07 fault code mean?

Your boiler has detected that the water pressure is too low, preventing it from heating your radiators or providing hot water effectively.

How much does it cost to fix Worcester Bosch error code H07?

Typical repair cost for the Worcester Bosch H07 fault is £0-160 including labour.

Locate the internal or external filling loop (usually a silver braided hose with small valves).

The current water pressure is too low, limiting the performance in heat mode as well as domestic hot water (DHW) mode

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Six most common causes of dropping pressure.

Almost always a stuck diverter valve on combis.

Step-by-step using the filling loop.