What does the Ferroli F37 fault code mean?

Your boiler has stopped working because the water pressure inside the heating system has dropped too low to operate correctly.

How much does it cost to fix Ferroli error code F37?

Typical repair cost for the Ferroli F37 fault is £80-120 including labour.

Locate the external filling loop (a silver braided hose) underneath the boiler

Manufacturer manual

Low system pressure (pressure switch detects insufficient water pressure)

Shared across the range

This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s manual.

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

Boiler cover options

A cover plan would handle faults like F37: no call-out fees, no surprise bills.

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Six most common causes of dropping pressure.

Step-by-step using the filling loop.

Safety-critical — turn off, read this.