Freezer displays E8 and may not cool properly; compressor may not start or may short-cycle.

Critical safety warning: The compressor and start components operate at mains voltage. Unplug the freezer before removing the rear cover. If you are not comfortable working around high voltage, contact a professional.

Steps to check E8:

• Access the compressor compartment: Unplug the unit and remove the rear lower panel to expose the compressor and start device.
• Inspect the start relay and overload: The PTC relay and overload protector are usually housed in a plastic cover on the side of the compressor. Remove the cover and look for burnt smell, discoloration, or melted plastic.
• Check for loose connections: Ensure all spade terminals are tight on the compressor pins and start device.
• Test the PTC relay: With a multimeter, measure resistance across the relay terminals. A completely open or visibly burnt relay should be replaced.
• Test the overload protector: Check for continuity across the overload device. If it reads OL at room temperature, it is likely failed.
• Replace faulty start components: Install a compatible Costway compressor PTC start relay and overload protector. Match the part numbers and wiring orientation.
• Reassemble and test: Reinstall the compressor cover and rear panel, plug in the freezer, and observe if the compressor starts smoothly and E8 clears.

Important: If the compressor hums and clicks off even with new start components, the compressor itself may be mechanically locked or internally damaged and will require professional replacement.