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Checked no cooling complaint, thermostat was set to cooling and system is calling for cooling. Outdoor unit is not running. Defrost control has a hard lockout. Reset lockout, started heat pump, checked refrigerant charge, found indoor every not opening. Switched between heat and cooling and the eev began to work. Cycled air conditioner, checked refrigerant charge and temperature drop across coil. If eev continues to fail it will need to be replaced.