Display shows E5 and the compressor does not start or stops shortly after starting.

Safety first: Unplug the cooler. The compressor and start components can be hot; allow them to cool before touching. Do not attempt sealed system repairs without proper training and tools.

Steps to address E5:

• 1. Listen for compressor behavior: When powered, does the compressor click on and off rapidly, hum then click, or stay silent? This helps identify start component issues.
• 2. Access the compressor compartment: Remove the rear lower service panel to expose the compressor, start relay, and overload protector.
• 3. Inspect start relay and overload: Remove the plastic cover on the compressor terminals. Check the PTC relay and overload for burn marks, rattling pieces inside, or melted plastic.
• 4. Test components: With power disconnected, remove the relay and overload. Use a multimeter to check continuity through the overload and appropriate resistance through the PTC relay. Replace if open or visibly damaged.
• 5. Replace start components: Install a compatible "STAIGIS compressor start relay and overload kit" for your model. Ensure the connectors are tight and the parts are fully seated on the compressor pins.
• 6. Reassemble and test: Reinstall the cover and rear panel, plug in the unit, and monitor whether the compressor now starts and runs smoothly.

Important: If the compressor still fails to start or trips the overload, the compressor itself or the main control board may be faulty. Sealed system work should be performed by an EPA-certified technician.