What does the Ravenheat 25E fault code mean?

Your boiler's internal heating unit has become so cold that the water inside it has frozen, preventing the system from operating.

How much does it cost to fix Ravenheat error code 25E?

Typical repair cost for the Ravenheat 25E fault is £80-250 including labour.

Increase the room thermostat setting to encourage the boiler to fire up.

Main heat exchanger frozen

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

Winter cause of ignition lockouts.

Each noise points to a different fault.

Sludge build-up — needs flushing, not bleeding.