What Is an Aircon Thermostat and How Does It Work?

Simple definition

A thermostat is the control that compares room temperature to your setpoint and tells the aircon when to cool more or idle. On splits it usually lives in the indoor unit / remote logic; on windows it is built into the chassis controls.

How it behaves

• Sensor reads air near the unit (not always the bed).
• When room temp rises above setpoint, cooling intensifies.
• Inverter units modulate; fixed-speed units tend to cycle on/off.
• Dirty filters and blocked returns confuse the sensor path — the room feels uneven even if the thermostat “thinks” it’s fine.

Owner habits

Pick a setpoint you can keep stable instead of constantly jumping 16°C ↔ 24°C. Stable control is easier on comfort and often on power. See inverter vs non-inverter.