What does the Ravenheat E41 fault code mean?

Your boiler has detected that water is not circulating correctly through the system, causing an unusual temperature difference between the pipes.

How much does it cost to fix Ravenheat error code E41?

Typical repair cost for the Ravenheat E41 fault is £120-£350 including labour.

Check that all radiator valves (TRVs) are fully open

Different flow/return temperatures

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.