What does the Potterton On Flash On fault code mean?

Your boiler is struggling to accurately measure its own temperature, so it has stopped working to prevent potential damage.

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

Typical repair cost for the Potterton On Flash On fault is £150-250 including labour.

Go to Thermistor 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.

7 signs repair isn't worth it anymore.

Break-even maths on monthly cover.

Realistic UK prices for a swap.