What does the Ravenheat 42E fault code mean?

Your boiler has detected an unusual temperature difference between internal sensors, suggesting water isn't flowing through the system correctly.

How much does it cost to fix Ravenheat error code 42E?

Typical repair cost for the Ravenheat 42E fault is £120-350 including labour.

Different temperature error

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

Each noise points to a different fault.

Sludge build-up — needs flushing, not bleeding.

Safety-critical — turn off, read this.