checking the run capacitor is your first move

For return-side

It serves as the direct Nordyne furnace parts replacement for legacy units originally fitted with the 626581 and 626581R switches

oil piping

Copeland 923-0058-00 Solenoid Coil checking the run capacitor isThe Copeland 923 0058 00 Solenoid Coil is a genuine OEM 24V solenoid coil engineered for use with compatible Copeland refrigeration and HVAC control systems. This Copeland solenoid coil provides dependable electromagnetic actuation for solenoid valves used in refrigeration circuits, liquid line control, and system regulation applications. Designed for reliable operation in demanding commercial and industrial environments, this coil helps ensure