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Fluctuating dhw heat Ferroli Modena 102?

When running the bath tap the dhw heat fluctuates from warmish to cold, the demand light remains lit and the boiler is firing ok. But when using any other tap in the house the water temperature is correct.Any ideas please?

Stuart McLean
December 2007
I have the exact same problem with a Modena 80. Downstairs hot tap OK, upstairs bath tap cycles hot and cold. CH is OK. Did you find the problem? Thanks in advance.

VB
January 2009

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