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    Rhreem Power Vent 2 works for about 5 minutes and then seems to over heat (4 Posts)

  • dagint dagint @ 6:56 PM
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    Rhreem Power Vent 2 works for about 5 minutes and then seems to over heat


    I have a Rheem Power
    Vent 2 40 gallon water heater.  It was new with the home and is now
    about 11 or 12 years old now.  Friday the blower motor stopped working
    and would only buzz and would do the 4 flash error code.

    For a while I was about to get it work for about 5 minutes.  burner
    would fire and blower would work and then very suddenly, after about 5
    minutes of working, the motor would sound like it was wining, where it
    was still running but something was stopping it.  When this occurs the
    vent stops pushing air out of course and gets hot and the motor seems to
    over heat.

    Because the temp, pressure/vacuum switch, and blower are in
    the same device I replaced the unit, part #sp12562.  While installing
    the new unit we ran a snake through the vent from both directions and
    there was nothing clogging the vent.

    Installed the new unit let it run and checked it an hour or 2
    later and the same issue.  Blower motor buzzing when attempting to start
    and is very hot when issue occurs.  4 Flash error code. 

    for blower to cool and kicked off the process again, runs for 5 minutes
    then blower motors starts whining and gets hot and eventually shuts
    down sometime buzzing like it's trying to start the motor but can't.

    Checked the element, removed the plate element fires correctly
    flame is blue the entire time including when the blower starts
    whining/getting hot.

    We removed the temp sensor (putting tape over the whole during test) same symptoms. 

    Checked outlet is 120v and the blue wire #8 gets 120v the entire time.

    power vent and pulled up metal deflector in the center of unit as far
    as I could everything looks normal.  There was a little corrosion near
    the top, but nothing excessive.

    Checked the vacuum tube, it's clean no clogs.

    this water heater has been in my house for 11 or 12 years and there
    have been no major changes to my home.  I'm wondering if there might be
    anything else to look for  to help resolve.
  • Bob Gagnon plumbing and heating Bob Gagnon plumbing and heating @ 10:20 PM
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    Maybe It's Time

    For a new water heater? They only seem to last about ten or twelve years in my neck of the woods.

    Thanks, Bob Gagnon
  • ChrisJ ChrisJ @ 11:12 PM
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    I'm not a pro but we recently tried to troubleshoot my dad's 6 year old Bradford White power vent heater and gave up.  After cleaning the pilot, changing the pilot, changing the burner assembly and I can't remember what else he just bought a new heater.
    Weil-McLain EG-45 connected to 392sqft of radiation via two 2" risers into a 3" drop header and 2" equalizer. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment

    Steam system pictures updated 6/5/14.
  • icesailor icesailor @ 11:43 AM
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    You need to put an Amp clamp on the hot wire to the motor after the plug or any place where the motor feed wire goes to the motor. As close to the motor is best. I would be checking for a bad receptacle and resistance through the plug. You will get 120volts but if the amp draw through the plug is high, it will cause the motor to overheat and be ruined. Sounds like a bad connection.
    Everyone needs a decent Amp Clamp. Owning both analog and digital has benefits. Don't leave the shop without them.
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