Product review (3 stars): Aprilaire humidistat should be considered a yearly maintenance item
Now that the heating season is upon us once again, I find that the humidistat is no longer working. This will be the second time it's been replaced. The solenoid also failed once before. It seems that I cannot go more than one heating season before something on this humidifier fails. I have an Aprilaire 600M that works well, when it works, but I've lost confidence in it and have to plan on replacing failed components on a yearly basis. They sure don't make em like they used to.