What does the Johnson Starley 37 fault code mean?

Your boiler has detected that there is not enough water in the central heating system to operate safely.

How much does it cost to fix Johnson Starley error code 37?

Typical repair cost for the Johnson Starley 37 fault is £0-120 including labour.

Locate the filling loop, which is usually a flexible silver hose under or near the boiler.

Low system water pressure

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.

Step-by-step using the filling loop.

7 signs repair isn't worth it anymore.