Our Aprilaire humidifier has started to make a loud ringing noise. It doesn’t last the whole heat cycle but seems to be making the noice for a longer period of time now. What can be the problem?
The water solenoid valve in your Aprilaire humidifier makes an audible sound anytime it opens and closes. This is normal operation. On occasion a mineral deposit may become lodged in the valve. When this occurs the valve may make a buzzing sound as the plunger is not seating properly. You may dislodge the deposit by lightly tapping the valve.