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L7224C1004 & Boiler temp do not match

Benjamin Member Posts: 2
I have a New Yorker boiler with a tankless coil. Our domestic hot water supply has been subpar. I noticed the HL was 170 and LL was 140, so I turned them up to 190 to 170. That fixed the domestic hotter issue, but i noticed the boiler T&P gauge read 220 when it shut off, and the aquastat read 190. Need some help here please.


  • billtwocase
    billtwocase Member Posts: 2,385
    I have never had an issue with those aquastats. It may be more residual heat after the burner has run that is driving up the temp. Do you have a mixing valve? Your problem is more likely there if you do. I would set it 160/180 for now, and have the control checked and compare it to what the gauge reads.
  • Robert O'Brien
    Robert O'Brien Member Posts: 3,350
    A tridicator is far from a scientific instrument!
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  • billtwocase
    billtwocase Member Posts: 2,385
    For sure Robert. I like my infrared to throw an objective third party into the mix, and usually side with it