verify your controller’s input configuration matches the Type III (Gray) resistance-temperature table

Automatic Reset Functionality: Features a 40°F differential

Precise airflow monitoring and combustion safety are paramount

This specific 100233643 gasket is designed for units produced before serial number D14

Aprilaire 4240 Male Disconnect Assembly 328140-751 verify your controller’s input configurationThe Aprilaire 4240 Male Disconnect Assembly is a factory original OEM replacement part engineered specifically for the Aprilaire 700 series whole house humidifiers. This male disconnect assembly serves as the critical electrical interface, plugging directly into the humidifier base to establish wiring continuity with the female disconnect. By facilitating a secure connection between the two halves of the humidifier unit, it ensures the HVAC humidifier