Genuine Daikin 4014322 Electronic Expansion Valve Assembly is the electronic expansion valve assembly that meters refrigerant flow through the system, opening and closing to the position the control board commands. When it sticks or fails, the unit may lose output, heat or cool poorly, ice up, or stop and start at odd times. A genuine assembly meters flow the way your Daikin expects, holding accurate control — where a non-genuine part can meter wrong and unsettle the system.