A new, automatic humidifier control is available for the 400, 600, and 700 humidifier models. The diagnostic circuitry light validates the control knob position and checks the outdoor sensor for continuity and the humidity sensor for no reading. The water panel service indicator light alerts homeowners that the humidifier water panel needs to be changed. The single-piece housing is designed for easier access to the wiring terminals, and a redesigned bracket for the outdoor temperature sensor is easier to install in the fresh-air intake, states the company.
Aprilaire, P.O. Box 1467, Madison, WI 53701-1467; 608-257-8801; www.aprilairecontractor.com.