I am looking for some help. We recently (3 months ago) had a megaflo and Worcester Greenstar boiler fitted. Pressure on all taps is good but recently and it seems to be getting worse the cold taps upstairs initially run cold for say 20 secs and then have a period of running very warm for say 20 secs before going back to cold. They are never cold cold but seem to have periodic 2 sec flows where the water warms slightly. Its seems to be getting worse with the 20 secs warm burst getting a little hotter each day and the periodic warm blasts more frequent.
Any suggestions as I am worried it might be dangerous
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