F5 fault on Halstead Eden Sb High Efficiency Condensing System Boiler?

I had exactly this happen today. I stupidly left the valves closed to a magnetic in-line filter, having cleaned it, and started the boiler. It ran for two minutes and then closed down. Fault F5 left me perplexed but luckily our plumber realised you need only to press the reset button that is located on the upper left corner between two copper feed pipes. It is triggered by overheating, and simply needs to be pushed in to re-close the circuit.

PaulT
January 2017

Did anyone have an answer for the F5 fault on a Halstead boiler ?

Gordon
October 2016