Boiler gas & electrical fault finding & components Navien gas Combi NCB

[@paulrossiter9567]

Never heard of these boilers J , your tutorial was top notch 👏🏻👏🏻👏🏻

[@warriorsofwarmth]

Thanks for the feedback they are very decent boilers

[@plumbingheatingandgas8545]

Always enjoy to watch your videos

[@Westy90_]

Very helpful thank you

[@alidincal]

NTC has an R value in cold. It becomes less when heated. Could it be wood and copper.