What does the Johnson Starley NO DISPLAY fault code mean?

Your boiler has lost power entirely, which is usually caused by a tripped switch at the fuse box or a fault with the electrical supply to the unit.

How much does it cost to fix Johnson Starley error code NO DISPLAY?

Typical repair cost for the Johnson Starley NO DISPLAY fault is £90-180 including labour.

Check your home's main consumer unit (fuse box) to see if any circuit breakers have tripped.

Lack of 230V AC supply to heater or loose wiring between terminal block and main PCB.

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

Work through these before the call-out.

7 signs repair isn't worth it anymore.

Break-even maths on monthly cover.