Arriston Euro Combi Gas Boiler is Overheating and Burner Cutting Off.

By Futli @futlim

Boiler was in Dollis Hill Avenue, Cricklewood London. Central heating was working but hot water cutting off. Heat differential was low and the Primary flow temperature get too high and cuts off the ignition due to poor heat transfer in the plate heat exchanger. Also the flame picture was yellow indicating incomplete combustion.This Arriston Boiler was in very poor condition, hence replaced with new Main 25HE eco a rated boiler.