The Aprilaire 4238 is the correct replacement for the following humidifiers:
The Aprilaire 4238 Humidifier Circuit board is a circuit board replacement for your whole- house, fan powered humidifier. This circuit board will keep your Aprilaire whole-house humidifier working at its best.
The Aprilaire 4238 Specifications:
The Aprilaire 4238 Humidifier Circuit Board includes a wiring harness for easy installation. The circuit board also includes a relay and transformer that supply 115V to a fan motor and 24V to solenoid when needed. Keep your whole house humidifier working at its best with the Aprilaire 4238.