The switch mounted on some accumulators is usually used to "sense low-side pressure and cycle the compressor".
Option: A
Explanation:
Automotive air conditioning (AC) devices using an orifice tube must also use compressor controllers to keep low side pressure and low temperature. Many use pressure cycling levers mounted on the accumulator to turn off the compressor when low lateral pressure drops below a defined level.
The duration of compressor cycling depends on the temperature of the ambient air and the flow of air through the condenser. Running the air conditioner at highway speeds or during cool days will result in a higher rate for the compressor to turn on and off.
