Aprilaire 4981 Circuit Board R-407A High-Efficiency ECM Technology: 1/3 HP

High-Efficiency ECM Technology: 1/3 HP constant torque output reduces energy draw compared to standard PSC motors

or visual build-up that cannot be cleaned

supporting capacities up to 6

When should this hard start kit be installed on a York unit

Aprilaire 4981 Circuit Board R-407A High-Efficiency ECM Technology: 1/3 HPThe Aprilaire 4981 Circuit Board is a critical OEM replacement part engineered specifically for Aprilaire 800 and Aprilaire 865 steam humidifiers manufactured before November 2014. As an internal control circuit board, this component acts as the "brain" of your humidification system, managing the 24V power distribution from the humidifier transformer and regulating the electrode steam canisters operation. If your units green power LED fails to