What is the purpose of an ambient temperature switch and a low pressure cutout switch?
What will be an ideal response?
Some air-conditioning systems run in the defrost position to dry the air going to the windshield. An ambient temperature switch keeps the compressor from working when outside temperatures are cold (about 350F to 420F). This protects the compressor from damage. Oil does not flow properly in very cold weather.
The system must not be allowed to operate when there is little or no refrigerant, because there will be no lubrication for the compressor. When pressure in the system drops too low, the low-pressure cutout switch will open the circuit to the magnetic clutch.
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