Welcome! Here are the website rules, as well as some tips for using this forum.
Our steam boiler installer will be here shortly to skim and flush again. I've noticed that since the last skim session the pressure gauge never moves, and the low water cutoff LED goes on and off even though there's an inch and a half of water visible in the sight glass. Is it possible these controls need to be cleaned out. Also, the high pitched whine has become intermittent and changes in pitch.