We have a Delta UV system

Recently changed bulb and quartz tube – was working fine – now neither of the lights on the ballast are on and system not working


  1. Nigel


    Hi Rae. First make sure you have proper power to where you are plugging in the UV ballast. Plug in another device that you know works at that same outlet. If this checks out you could try and bypass your psi switch under the Delta UV bonnet. If that checks out ok you could have a bad ballast. I’ve attached a purchase link to a ballast for your convenience. They are in stock and would ship today if purchased before pm 3: https://aqua-tech.ca/store/index.php/pool-parts/uv-parts/delta-uv-sanitizer-ballast-part-number-70-10420.html

  2. Dennis Engelman


    I have a Delta UV ultraviolet solution system for my pond/ had a crack in sleeve that made it keep shorting out. Replaced sleeve & new bulb/ still did not come on / received a new ballast transformer/ hooked up & still get a fault notice / so what could be wrong??

    • Nigel


      Dirty filter, bad pressure switch or poor wire connections perhaps Dennis.

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