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125 Pro Fix

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Lurkin' Murkin'
Lurkin' Murkin' Member Posts: 136
Bacharach also changed the design of the thermocouple wires and flue sample tube inside of the probe handle, at least on the PCA25 unit. Some seemingly simple connection methods appear to have been poorly thought out on these?

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  • Big Ed
    Big Ed Member Posts: 1,117
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    Themperature Reading

    My 125 Pro has a problem reading stack temperature. It would read a incorrect low tempeature for stack, more like amberant temperature.. Bad thermister ? I would pull the plug and the stack temp reading would blank out..
  • Mark Hunt
    Mark Hunt Member Posts: 4,909
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    Take the plug apart


    and make sure the connection is good. I had the same thing happen on one of my units a while back. Re-connected the wire and it works perfectly.

    Mark H

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  • Paul Fredricks_3
    Paul Fredricks_3 Member Posts: 1,557
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    I've got one doing the same thing. The wire connection was OK. I am thinking the thermistor too. I'll be checking it out today and I'll let you know.
  • Paul Fredricks_3
    Paul Fredricks_3 Member Posts: 1,557
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    I plugged the probe into the unit and it only read 76 degrees, even if I warmed the end. I took the handle apart and found that both wires were pinched and possibly shorting. When I separated them everything worked fine.

    Our techs have used the probes to widen the holes in the flue pipes. This has caused the handles to break, many are taped together. My guess the short happened when the tech tried to repair the handle.
  • Big Ed
    Big Ed Member Posts: 1,117
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    Thanks

    Thanks for the input.I now know where to to look .
  • Paul Fredricks_3
    Paul Fredricks_3 Member Posts: 1,557
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    If you mean those little squeeze wire connectors, I agree. Like a Ferarri with spinners.

    BTW, if you have to redo the wires on the plug, the red one goes on the left. Switch them and you'll get negative stack temps and incredible efficiencies.
  • Rudy_4
    Rudy_4 Member Posts: 3
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    As always

    If you guys need any help with your instruments, give me a shout. 412-576-1350

    Just an additional thought, if anyone is going to NAOHSM or NEFI, we'd be happy to do any minor repairs and I'm driving to Hershey so could probably do a few calibrations (the airlines probably won't let me fly to Boston with tanks of CO!!).

    The other great thing is Dave, one of the head engineers will be at NAOHSM to answer any tecnical questions - great guy!!

    Let me know ahead of time so I'll be sure to have the right cal gas and any parts/pieces.
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