What does the Baxi Flash Off On fault code mean?

Your boiler has detected that it is firing up without enough water inside, which can lead to overheating and potential damage.

How much does it cost to fix Baxi error code Flash Off On?

Typical repair cost for the Baxi Flash Off On fault is £100-250 including labour.

Check the pressure gauge on the boiler or under the sink; it should be between 1.0 and 1.5 bar.

Go to Dry-Fire section of the fault finding instructions.

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.