What does the Heatline Flashing 90 fault code mean?

Your boiler has become too hot and has automatically shut down to prevent damage or safety issues.

How much does it cost to fix Heatline error code Flashing 90?

Typical repair cost for the Heatline Flashing 90 fault is £90-250 including labour.

Check that all radiator valves are fully open to allow water to circulate

Overheat Thermostat

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.

Work through these before the call-out.