If the machine does not start and the electrical components are functioning properly, what should be the next check?

When a machine does not start but the electrical components are functioning properly, checking the low pressure cutout pressure switch should be the next step. This is because the low pressure cutout is a safety device that prevents the machine from running under unsafe low pressure conditions. If the system is low on refrigerant or is experiencing other issues like a blockage, this switch will interrupt the operation to protect the system.

Verifying the status of the low pressure cutout and pressure switch can help diagnose issues related to refrigerant levels or potential faults in the refrigeration cycle. It is crucial to ensure that the system has sufficient pressure for safe and effective operation. If this switch prevents the machine from starting, addressing the underlying cause of the low pressure will be essential before the machine can function properly.

In contrast, other checks like inspecting the high-pressure switch, thermostat settings, or the purge valve may not directly relate to the starting issue if electrical components are confirmed to be operational. These components typically affect different parameters of the machine's operation and may not indicate why the machine initially fails to start.