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Ferroli DOM F24B Is leaking from the two 22mm pipes on the secondary heat exchanger

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  • Anonymous Nov 27, 2008

    me too. i had one leak so bought new seal set and put them in then all 4 started leaking. these boilers have **** poor fastenings and are a pain in the backside. im going to try using ptfe tape tommorow to seal it. not sure if it will work but ill get back to you if it does.

  • jamie-1966 Dec 14, 2008

    mine is leaking from all 4 on the secondery heat exchanger and from thecopper heat exchanger i put new orings in it put still leaks so bad what can i do the ferroli f24b is only 16months old

  • Anonymous Jan 03, 2009

    Same problem here -- leaks from the secondary heat exchanger. Had all 4 o-rings replaced and 6 weeks alter it's started again. Can't decide whether to live with it or not. I found the problem is much worse if you have the eco setting selected as the water gets too cold when not in use.


    Can any fix for this ever work for more than a few weeks?

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Yes, this is a common problem on the domi compact. unfortunately ferroli accept no responsibility if not in warranty period! can be a costly repair..

Posted on Aug 19, 2008

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Had this before on this model, ignore the fault codes provided you have checked possible causes given in manual. it is either the thermistor is too close to the heat exchanger on the top left, move it further down the pipe and the fault normally stops. it is the thermistor not overheat sensor as that would induce a fault code. if the fault goes away when the cover is off it is the ignitor lead, sounds strange but electrical leakage is occurring to earth due to the high voltage leaks onto the case,


The mad sparkie (also gas engineer!)

Posted on Jan 07, 2014

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Scrap the boiler domi compacts are total ****

Posted on Dec 24, 2008

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I just had the same problem with the same boiler and was recommended to get in touch with a company called Wolseley uk. http://www.wolseley.co.uk/servlet/reality/rscp/IN.BRADETFRMBP1?app=centers&ses=99999|47543&website=www.wolseley.co.uk
link is to their website branch locator. You need to click on parts center on the left hand side of your screen under branch locator, then put your post code in as easy as 123. The parts you need are o rings. They come as a set, their part number for the set is 459382 FROLI 39817620 ORING SET as shown on my invoice. Only cost £7.19 + VAT. Plus bought 798007 REGIN REGZ40 SILICONE GREASE 50G cost £5.47 + VAT (smallest size they do). This is to lube Orings before fitting and pushing pipes together. Make sure you have turned all stop taps off that are under the boiler and drained rads.
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Please rate this solution.

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