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  1. K

    Worcester Highflow 400 RSF intermittent DHW

    Guys, Drained the CH system, replaced expansion vessel and currently on Sentinel x400 since 1.5 weeks ...but notice DHW water burner is cutting out time to time when on constant hot water demand! think should remain constant and so water temp fluctuate bit. More noticeable when on shower, not...
  2. K

    Worcester Highflow 400 Electronic RSF

    Folks, Moved to new property about two years ago, where we have Worcester Highflow 400 Electronic RSF (originally installed ~2002) and looks there are some issues and was wondering if any experts around and able to check in Aberdeen/Aberdeenshire area. Here's what's happening... * Started...
  3. K

    Any engineers around Aberdeen who knows Potterton Puma 100e?

    Guys, is there any one here who know good engineer familiar with Potterton Puma 100e. Its fluctuating HW temperature and seems pointing towards scale in heat exchanger?? Hope not!!! So looking someone to actually diagnose the problem and if thats really a heat exchanger than replace the one...
  4. K

    Puma 100e noise/lockout/temp swing (at low flow)/too hot DHW

    Hi Guys, Sorry if it’s too long story just trying to highlight what was/is the problem of my Potterton Puma 100e and what I have done so far to resolve it. Hope this helps finding real culprit. Had moved to the property since couple of years, serviced the boiler when moved in to the...
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