Wine cooler shows E5 and may not cool; compressor may not start or may shut off quickly.

Safety: Unplug the unit. Compressor and inverter circuits carry high voltage; if you are not trained, contact a professional.

• Access rear compartment: Pull the wine cooler away from the wall and remove the lower rear access panel to expose the compressor, start device, and control/inverter boards.
• Listen and observe: Restore power briefly and listen for clicking from the compressor area. A repeated click without compressor start often indicates a start device or compressor issue. Then disconnect power again.
• Inspect start device: On non-inverter models, remove the plastic cover on the compressor terminals and inspect the PTC start relay and overload. Look for burn marks, melted plastic, or a burnt smell. Replace the start device kit if damaged.
• Check wiring and connectors: Ensure all harnesses to the compressor, inverter (if present), and main control board are fully seated and not heat-damaged.
• Inverter models: If your Monogram wine cooler uses an inverter compressor, inspect the inverter board mounted near the compressor. Look for bulged capacitors or burnt components. Inverter diagnosis typically requires specialized tools; if visibly damaged, replace the inverter board with the correct Monogram part.
• Compressor condition: If the start components and inverter are good but the compressor hums loudly then trips, the compressor may be mechanically locked. Compressor replacement requires sealed-system work and EPA-certified handling of refrigerant.

Due to the complexity and safety concerns, E5 faults are usually best handled by an authorized Monogram service technician.