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Prestige boiler issue

I have like-warm water to all faucets in my home. All discharge pipes from boiler are almost too hot to touch. Heat in house works just fine. I’m at a loss as to why this is happening. HELP!


    EBEBRATT-Ed Member Posts: 14,593
    dhw heat exchanger may need internal cleaning with chemicals. did this happen gradually or all of a sudden?
  • psb75
    psb75 Member Posts: 756
    Is there a bad mixing/anti-scald valve on the system?
  • tim smith
    tim smith Member Posts: 2,710
    Bad pump for indirect hw tank?
  • bburd
    bburd Member Posts: 789
    This can happen when a mixing faucet, like a shower valve, is left open and the flow stopped with another valve downstream, such as a handheld showerhead.

  • Do you have a Prestige Solo (heating only with a sidearm water heater) or Prestige Excellence (combi)?
    8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour

    Two btu per sq ft for degree difference for a slab
  • Zman
    Zman Member Posts: 7,496
    My bet is a cross connect between hot and cold. What changed? Did you add a shower head with a shutoff somewhere?
    "If you can't explain it simply, you don't understand it well enough"
    Albert Einstein