What does the Ravenheat lockout fault code mean?

Your boiler has detected that it is getting too hot and has safely switched itself off to prevent damage.

How much does it cost to fix Ravenheat error code lockout?

Typical repair cost for the Ravenheat lockout fault is £120-250 including labour.

An overheat cut off thermostat set slightly higher than the high limit thermostat acts to turn off the burner to resetable "lockout" (Fig. 50) 3.

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.

Work through these before the call-out.