Troubleshooting the Intelligen Control Board & electronic expansion valve, EEV. Repairs followed, hope you enjoy!

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9 thoughts on “Another Callback! | Intelligen by Heatcraft Troubleshooting | HVACR

  1. Thermoelectric7 says:

    Was there a service port inside the condensing unit? Could have used the recovery machine to move the refrigerant from the lineset to the condensing unit rather than a recovery tank, if so.

  2. Berated says:

    I do little commercial work, but I have a ton of experience with EEV's on residential systems. Thing's I ALWAYS DO to prevent EEV damage/failure/clogging is:
    1-braze with nitrogen
    2-heat shield EEV when brazing AND use low heat
    3-Place my Drier filter as close as reasonably possible to my EEV

    Do you use MeasureQuick? I only ask because I see you were using the fieldpiece app for your probe. If you haven't tried it out I highly recommend it over the fieldpiece app.

    Way to pay due diligence on this job and not make a hasty diagnosis. I myself know all too well how bad it feels to make a wrong diagnosis when looking back, and knowing I could have been more diligent is my troubleshooting. But hey, we learn far more from our failures than we do our successes; right?

  3. Jonathan Hensel says:

    I had a brand new evap coil on a changeout that the eev was stuck closed. Found that out when purging to braze in line set and nitrogen wasn’t going through. So yours may have been bad from start

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