Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

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: 294
    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: 587
    That pressure could very well be the cause of the trouble. Try bringing the pressure up to near 20 and reset the boiler.
  • Solid_Fuel_Man
    Solid_Fuel_Man Member Posts: 2,630
    Can you post some pictures? When was the last time it was serviced?
    Serving Northern Maine HVAC & Controls. I burn wood, it smells good!