When a window air conditioner is turned on but not actively cooling or removing humidity (i.e., the compressor is not running), it still consumes some energy to power its internal electronics, display panel, and fan operation. However, the energy consumption in this "standby" mode is significantly lower compared to when the compressor is actively running.
The exact energy consumption in this standby mode can vary depending on the specific model and its power-saving features. Typically, the power consumption in standby mode for a window air conditioner can range from 1 watt to around 10 watts.
To get a precise measurement of the standby power consumption for a particular model, you can refer to the manufacturer's specifications or check the energy label provided with the unit. Some newer air conditioners come with energy-saving modes or sleep modes, which further reduce power consumption when the unit is not actively cooling.
Keep in mind that even in standby mode, leaving an air conditioner on for extended periods can still contribute to overall energy usage and result in higher electricity bills. If you want to minimize energy consumption when the air conditioner is not needed, it's best to turn it off completely when you're not using it or consider using a programmable thermostat to control its operation more efficiently.