I'm on my third year with my truesteam.
Year 1: Worked ok. Cleaned twice that season.
Year 2: Didn't work well. All green lights but it never brought the humidity above 30% (12 gal unit in a 3500 sq ft house). Cleaned numerous times.
Year 3: This year the thing has not worked. It's either showing a cleaning required message, or (after cleaning) just sits there showing the green humidifying light, but no steam coming out. The water in the tank is getting boiling hot, but the unit drains constantly.
After spending hundreds and hundreds on service visits from HVAC pros, I have decided this unit is totalled. In my opinion these units are junk. Good luck you guys, cleaning away like I did... I wonder if you'll get past year three. There's a five year warranty but good luck with Honeywell on that. Terrible product support and customer service.
Right now I am using two Aeroswiss table top humidifiers and keeping humidity levels well above what the Truesteam ever did. Pain in the *ss filling the tanks twice a day, but way less time spent than with that Truesteam hunk of junk.