Posting a message to the forum will remove the above advertisement
  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.
  2. Checkout our Plumbers Insurance area - heavily discounted Public Liability Insurance and Van Insurance specifically designed for plumbers.

Discuss Oil boiler/burner trouble in the Oil and Solid Fuel Forum area at

Thread Status:
Not open for further replies.
  1. Daveroon

    Daveroon New Member

    Hi there,

    long time lurker first time poster. I have an external grant boiler with a reillo rdb burner.

    My tank ran dry last week got it topped up yesterday and so my trouble began.

    I bled the burner as I normally would. Heating fired no problem went back into house and realised the heating was not on...back out to boiler. I noticed when moving the wiring junction box that it sparked the burner into life and it fired for a minute or two and then knocked off. When I got back into house I noticed the heating controls had gone and the fuse had blown. I replaced the fuse and it blew again immediately.

    I isolated the pump checked the motorised valves all with same result. When I isolated the boiler limit stat I found that the fuse didn't blow, heating controls were back on but the reillo burner was dead..

    All my electrical connections are sound and untouched by the elements.

    Anyone have some suggestions as to what the issue is from info above? Does the burner need the high limit to receive its power?

    oh I had a spare stat so I went ahead and replaced it but same issue occurs.

    thanks in advance

  2. Best

    Best Trusted Plumber Top Contributor!!

    Hello Dave. I would think you better get a heating engineer or electrician in to sort it.
    Wiring junction box?
    The high limit stat is just one of the stats that can break the link to the burner if control stat fails for example. It's essential.
    • Like Like x 1
  3. lame plumber

    lame plumber Guest

    best tell the technician you call out all you have done and when it was last serviced properly, it will save an awful lot of time and tears. to be clear, youve probably fried some essential control components so a bloke with a van full of spares is fairly high on your list of priorities.
  4. Daveroon

    Daveroon New Member

    Thanks very much for replies.

    I hope I've not done too much damage in taking on the fault finding myself.

    I'll get someone out to look at it asap

    • Like Like x 1
Similar Threads - boiler burner trouble Forum Date
Boiler - burner - hex cleaning. Plumbers Arms Dec 28, 2018
Nearly new Keston combi boiler flue coughing/ejecting hot water & steam Plumbing Forum Yesterday at 8:02 AM
Thread Status:
Not open for further replies.