Dual-Pressure Switch
WARNING: This page is about a different car, the 2001 Suzuki Swift and 2000 Suzuki Swift. However, it is still accessible from the selected car via links, so may be relevant.
The dual-pressure switch is mounted in top of receiver-drier, and acts as an A/C system circuit breaker. The switch stops compressor operation by turning off A/C compressor circuit when refrigerant pressure drops to less than or exceeds a specified range.