Boiler comes on and after approx 3 minutes cuts out again. The "Reset" LED flashes on & off and the "Burner on" LED pulses quickly. Does anyone know what this is the fault signal for on the boiler or can anyone identify the fault. A plumber has replaced the PCB & pressure switch neither has helped.

Neil, May 2007

Why don't you download the manufacturers book from their website?

All the faults and light sequences are listed in the book.

Definitely sounds like the thermistor. Have worked on dozens of the Micron boilers.

Baz (CORGI Eng), May 2007

possible thermister fault

Paul the gas man, May 2007