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Hello ALL I was called out to a oil combi boiler black smoking first thing i think is great going to get covered in soot, well i cleaned it all up changed nozzle fired it up and started my analyzing the Co2 was going too high opened up air settings all the way still going above 13%...

Hello all Just got back from an oil boiler serviced 2 weeks ago customer complained burning sooty went back changed nozzle did another analysis 12% co2 the sooty exhaust gone but the only thing that concerns me is the flue exhaust temp got up to 400 C is this the soot burning off ? The manual...

Hello all Just got back from an oil boiler serviced 2 weeks ago customer complained burning sooty went back changed nozzle did another analysis 12% co2 the sooty exhaust gone but the only thing that concerns me is the flue exhaust temp got up to 400 C is this the soot burning off ? The...

Hello all I have a oil boiler open vented 4 pipe system with gravity hot water and pumped heating. The boiler started making a pinking sound or boiling sound i think you call it kettling well to me sounded like poor circulation so i changed the pump and success noise gone now 3 weeks later...

Hello All I have a customer that wants a wood burner and oil boiler link up yet wants mains pressure hot water i have been told that you are not allowed to have an unvented cylinder with a neutralizer yet dunsley have diagrams for this...

Hello I am a bit of a novice plumber I have plumbed a new build and have put underfloor heating downstairs and radiators upstairs and my question is when the only thing calling for heat is the underfloor heating will this put pressure on the pump in the boiler ( sealed system ) and was...