I have a Weil Mclain gas steam boiler (~1992-1993). After I purchased the house the automatic water feeder never worked. (automatic feeding function, manual push-button feed works fine). In the past I normally manual fed once every two weeks. But starting from last winter I had to put water more and more frequently. Now I almost have to put water every 24 hours.
Last Fall I replaced the water feeder with a same model (McDonnell and Miller, 24vDC). After I installed the new one still did not work automatically. I called the McDonnell and Miller and its technical asked me to look into the Low Water cut-off. What I found out is the water feeder is 24vDC and the low water cut-off (also McDonnell and Miller) is 120vAC. The tech said it might be the incompatible voltage of the water feeder and low water cut-off caused the automatic feeder not working.
To make sure I called the local PSE&G serviceman to check and they told me the boiler did not have a ‘Hartford Loop’, so it’s not safe to operate. He further said the burner might have been cracked so that water leaks out, that’s why I need to add water every 24 hours. But I never see any water on the floor if the burner cracked.
I am totally lost, please help me.