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Rinnai combi E110C

BillAllen Member Posts: 103
For the past 4 weeks my own Combi will deliver a sudden momentary cold blast of cold water while in the shower. Lasts for maybe 1 minute then hot again and good, not fun! Can't figure it out doesn't seem to have loss of gas or water pressure. Not sure if it is through out the house or just this shower. Might check the shower valve but I doubt that is the problem. Clean the boiler with vinegar yearly. Crazy.


  • kcopp
    kcopp Member Posts: 4,187
    Any error codes? How long do you have hot water before this happens? What shower valve is it?
    EBEBRATT-Ed Member Posts: 13,423
    Maybe run the water b4 getting in.
  • BillAllen
    BillAllen Member Posts: 103
    Have good hot water 4 minutes before it starts and not all the time. No error codes. Symmons
  • kcopp
    kcopp Member Posts: 4,187
    You may very well want to swap out the spindle inside the valve. They do get junked up.