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worcester 280 combi?

The overheat switch trips out intermitanly I have renewed the switch and its made no diference, how do
i fix this.
Thanks
Domenico Carchedi, January 2011
It may not be the cut-out switch that is the problem, do you live in a hard water area as I do? if so the heat exchanger is 'furred-up' so the system over heats.?

Robert, January 2011
link Click here to see other fixes for Worcester 280 combi.