Hi all,
Im trying to descale the boiler, heat exchangers and element on a M27. Dont know what these parts looked like when new, but Im assuming they were all a bright copper colour (?)
When I pulled the machine apart they all came out with a 100% dark brown / black coating (which I thought was the scale). After soaking for 24hrs plus in a mixture 2ltrs water and 500g (whole container) of Cafetto EVO descaling powder, and some scrubbing with one of those green pot scrubber pads, only very small areas of the HXs and bits of the element are going back to a orange copper colour. The small bits of white however (lime / calcium?) pretty much all disappeared or softened up and came away easily.
Should I keep persevering with longer soaking or try something else? Or was the black colour some sort of coating that is supposed to be there?
Anyone know what the HXs are made from, and if they are supposed to have some sort of copper coating?
thanks.
Im trying to descale the boiler, heat exchangers and element on a M27. Dont know what these parts looked like when new, but Im assuming they were all a bright copper colour (?)
When I pulled the machine apart they all came out with a 100% dark brown / black coating (which I thought was the scale). After soaking for 24hrs plus in a mixture 2ltrs water and 500g (whole container) of Cafetto EVO descaling powder, and some scrubbing with one of those green pot scrubber pads, only very small areas of the HXs and bits of the element are going back to a orange copper colour. The small bits of white however (lime / calcium?) pretty much all disappeared or softened up and came away easily.
Should I keep persevering with longer soaking or try something else? Or was the black colour some sort of coating that is supposed to be there?
Anyone know what the HXs are made from, and if they are supposed to have some sort of copper coating?
thanks.








and am a silly b*stard who didnt read the label. 






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