What does the Halstead 42 fault code mean?

Your boiler has stopped heating because it cannot detect enough water moving through the system to operate safely.

How much does it cost to fix Halstead error code 42?

Typical repair cost for the Halstead 42 fault is £120-250 including labour.

Check your boiler pressure gauge to see if it is below 1.0 bar.

Water flow failure/ Flame for a short period only - Low water pressure / No flow / Dry run protection

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

Almost always a stuck diverter valve on combis.

Each noise points to a different fault.

7 signs repair isn't worth it anymore.