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I got tired of filling, refilling, endlessly refilling two console humidifiers (one upstairs, one down) so I located them near a water line, used a tube-pierce connection and ran a short line to each humifidier.

In the middle of the line I added a water-intake solenoid valve from an icemaker assembly, bridged across the light "fill" light on the humidifier. Fill light comes on, solenoid opens, water passes, light goes out, water stops, humidifier runs again.

I've been using the set-up on both humidifier (one Kenmore, one Bionaire) for maybe eight years and it works great, except for one thing. About every two years, the solenoid burns out (or stops working for whatever reason) and I have to replace it. (Actually, not to belabor the issue, but I buy the "double" valves for icemaker/water in the door and change them when the first burns out, then replace when they're both gone.)

The valves are rated 120VAC, so why would they fail so often (about every two years). The one on the fridge, where it's supposed to be, lasted about 10 years, and I replaced it 5 years ago and it's doing fine.

A replacement is only $20, so it's not a big deal, but I wonder if anyone knows why these things keep going bad?

(Yes, I know there are gizmos to accomplish whole house humification which attach to the furnace/ductwork, but they don't work for me due to a unique installation problem. When I replace the entire furnace maybe. Not now.)
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