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Rinnai R53i-1

Paul SPaul S Posts: 535Member
hey everyone....i am having a problem with a rinnai tankless water

heater model#r53i-1....they have intermittent problems with the hot

water....for example it will lite then lockout 10 seconds later....then

there will be times that it will stay firing while the water is being

used for 20 straight minutes.....this rinnai water heater was installed

by a unknown company...there is no digital display to view fault codes

or adjust temp.....factory default for water temp is at 120f.....rinnai

heater is vented vertically about 14 ft to roof(the condensate drain on

the pvc vent has a plug in it , not drained)....i called the tech

support line and the technician couldnt really help me because the

digital display wasnt there....he asked me to checked the clear rubber

hose connected to gasvalve which is connected i think to the combustion

chamber and there was water in the tube????.....the technician told me

it was a faulty gas valve(coil sticking??) question ishow would

water get into that rubber hose ??? and does anyone think its a faulty

gas valve???

                           Paul S


  • Aaron_in_MaineAaron_in_Maine Posts: 206Member ✭✭✭
    edited January 2013
    Gas valve

    Yep once water hits that vinyl tube going to the gas valve your valve it's done. If the unit is vented vertical you need to hook up the condensate drain on the vent or it will happen again. I had to fix one that did the same thing. The installer pitched the sidewall vent back to the unit instead of away from the unit.
    Aaron Hamilton Heating
  • Paul SPaul S Posts: 535Member
    thanks Aaron

    I will replace gas valve and drain the condensate collector that's on top of the unit....but why do you think this just happened its been installed for seven years now without the condensate collector drained...
  • Aaron_in_MaineAaron_in_Maine Posts: 206Member ✭✭✭
    Not sure

    Is this unit in a cold climate? The one I fixed was only in for a year and a half but in the cold Maine winter it sped up the process it was condensing in the vent got down to the burner. When I got there water was in the tray under the burner.
    Aaron Hamilton Heating
  • Paul SPaul S Posts: 535Member

    Yes its in a cold climate...its in Staten island new York.....most of the venting Is inside the drop ceiling then its goes through a roof to the outside
  • JackJack Posts: 797Member ✭✭✭
    Paul posted this on multiple topics

    The Main Wall, gas heating and here on DHW. All comments are not in one section, so
This discussion has been closed.


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