The present application relates to techniques for operating a refrigerant climate control system in one of a plurality of operating modes. In an example process, sensor data is received. The sensor data may correspond to a current state of a refrigerant in a receiver of the refrigerant climate control system. The process may also include receiving an energy control signal requesting operation of the refrigerant climate control system. The process may also include determining an operating mode of the refrigerant climate control system based on a signal type of the energy control signal and the current state of the refrigerant in the receiver. The process may also include instructing the refrigerant climate control system to operate in the determined operating mode.