Fluctuating hot water with Vaillant Ecomax combi 828/2E
- Thread starter PhilH
- Start date
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- 9 Apr 2016
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Remove and clean out the piping with the flexi hose in the middle of it leading to the main heat exchanger.... I had the same issue and after removing that pipe work i found it was quite clogged and had reduced bore... And good clean out of that pipe work and flexi along with changing the nts sensor solved the problem for me.
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