I recently noticed the whole house humidifier (installed by the previous owner) stopped working (Honeywell 280A). Filter dry, no flow, no click from the solonoid valve.
I did some investigation and figured I had a bad solonoid valve.
After installation, I noticed a bad smell (burning plastic / electric) that seemed to be coming from the board in the housing next to the air pressure switch. After looking closely, one of the components looked toasty.
I did tons of searching to try and find this part but no joy.
After getting really frustrated, I finally wondered.. what the heck does this board do anyway? And do I need it? after all, the humidostat and air pressure switch are just a series of switches that need to be closed to start water flow.... (right?).
So I omitted the board, and simply put the humidostat and air pressure switch in series and... everything seems to work great.
My question is: - What function does this board fulfill? - Why can I not find it anywhere for sale? (Every offering for an air pressure switch only includes the mechanical air pressure switch, and not this board). - Am I a fool to run the system in the (simplistic) way I have it set up currently?