Question about Rheem 50 Gallon FVR NATGAS Water Heater 6YR 22V50F1

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Hi, i have a water heater (Rheem XG50T...) w/ a wifi module. Today, the temp / pressure relief valve drained a little bit and now my water heater does not work as the error A102 does not get clear eve

Dried up everything (sensor as well). Can't get the water heater to start again (it won't as long as the error A102) is on. What can I do?

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  • Yanick Imhof
    Yanick Imhof Dec 06, 2014

    Exact model is: XG50T12DM40U0


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Error A102 ?
Where does the error code show on your model?
The XG50T appears to have honeywell gas control valve that flashes error code with series of blinks, and not LCD readout.

If the release of water got electronics wet, then the electronic parts likely will not function.
Release of water from TP valve means temperature of water inside tank exceeded the temperature-pressure rating of TP valve.
This is a safety feature.
Water from TP can indicate thermostat failure, or other less serious issues.

Your water heater appears to have 9 year warranty.
Serial number located on label on side of tank will have numbers- 1st and 2nd digits are week of manufacture, 3rd and 4th digits are year of manufacture,
Call Rheem since they do not post service manuals.
Other companies post service manuals and are much easier for DIYers.


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Posted on Dec 06, 2014

  • 4 more comments 
  • Yanick Imhof
    Yanick Imhof Dec 06, 2014

    Hi Gene, I can read the error from my iPhone (via the wifi module). I am not really sure what somehow it got stuck with this error...

  • Yanick Imhof
    Yanick Imhof Dec 06, 2014

    Anyway, thanks for the useful link and detailed explanation. I am going to check it out a few more time. Raheem support should come by tomorrow. Thank you

  • Gene Haynes Dec 06, 2014

    Wow... email eror c odes are new to me... I want to know more about this advancement,,, but Rheem simply does not post DIY resources for the homeonwer or the repair/website and forum guys like me.

  • Gene Haynes Dec 06, 2014

    I meant wi-fi error codes/ not email. I sure wish I had the full product manual for that system... send any resources you get from Rheem so we can hone our skills at helping other folks

  • Yanick Imhof
    Yanick Imhof Dec 07, 2014

    Rheem came yesterday and it appeared that the main PRV was effective. This has been replaced but the error is still showing up on the mobile app. I'll try to return the wifi module to Home depot and see what they say.

  • Gene Haynes Dec 07, 2014

    PRV or pressure reducing valve is needed if household water pressure exceeds 80 psi. This is to protect the tank and household plumbing from damage caused by excessive pressure on water line. PRV can cause a 'closed system' where the hot water inside tank cannot expand. The pressure inside tank builds up and the TP valve releases water. Usually if you have a PRV, it is recommended that you install expansion tank on the cold water line, between PRV and water heater tank. Otherwise, I could not find any resource for the error code displayed. Rheem does not post service manuals... and this causes customers to call for service technician... which is good for Rheem's profit, but not always best for customer. Other water heater manufacturers post service manuals.


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