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Replacement LWCO

JIMBO_2 Member Posts: 127
I am replacing the LWCO (GuardDog RB-24) that shorted out.  What might be my best option for replacement, 24 v or 120v?  How about the new RB-24E, if the wiring plug is the same as the RB-24?  Reliable and easy to wire?  Any suggestions?  Hot water boiler, CGi-3.


  • will smith_4
    will smith_4 Member Posts: 259
    LWCO replacement


    When you said that your existing Guard Dog shorted out-exactly what did you mean? Was it the probe, or the electrical circuit?  Make sure you isolate the short issue if it's control/safety related-something else could be causing you problems, and make you think it's the LWCO, like a short somewhere else in the circuit. If it does happen to be just a bad Guard Dog, I personally don't see why you'd want to go with a different voltage version (24v as opposed to 120 v)-I haven't heard of any outstanding issues with either choice. Then again, none of us know anything-until we know it. Then we die and forget it all.

    All the Best
  • JIMBO_2
    JIMBO_2 Member Posts: 127
    Electrically Fried

    It shorted out internally and burned out the transformer.  I have heard this model (RB-24) has been known to do this.  I hear they have a newer version (RB-24E), with brass threads and improved circuitry, but I cannot help but wonder if the wiring is the same and they are interchangeable, unplug one and plug-in the newer model?  That would make things much easier.
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