Brown Hot Water and Noise From 28i Junior Combi Boiler Help and information on all topics relating to your central heating, air conditioning and ventilation issues.

[tappa9]

Got a 28i junior combi fitted 2005. It is making noises like boiling water / popping bubble wrap at the top of heat exchanger. The got water is brown at times. There is no air in the system. The pressure gauge fluctuates wildly when the noise happens. Any ideas