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weil mcclain 97+ hot water boiler - low water cutoff open ( system lock out / heat not working )

yogi802 Member Posts: 6
can some one help please
hot water boiler
weil mcclain 97+ ( installed in 2013 )

showing error message in RED

low water cutoff open
system: lockout

will appreciate your guidance / help ASAP


  • ch4man
    ch4man Member Posts: 296
    assuming the low water cut out is not faulty and its doing its job, i'd say your boiler is low on water. whats the pressure gauge reading?
  • yogi802
    yogi802 Member Posts: 6
    pressure gage is down - around 10 psi
  • Grallert
    Grallert Member Posts: 662
    That pressure could very well be the cause of the trouble. Try bringing the pressure up to near 20 and reset the boiler.
    Miss Hall's School service mechanic, greenhouse manager,teacher and dog walker
  • Solid_Fuel_Man
    Solid_Fuel_Man Member Posts: 2,646
    Can you post some pictures? When was the last time it was serviced?
    Serving Northern Maine HVAC & Controls. I burn wood, it smells good!