Unit shows E5 and may stop cooling or limit operation; sometimes associated with high temperature or overload.

Safety: Unplug the unit. Do not attempt to bypass any safety devices. High voltage and high current are present in compressor circuits.

Steps:

• 1. Check power supply: Verify the outlet voltage with a multimeter (typically 115V or 230V depending on model). Avoid using long, undersized extension cords; plug directly into a properly grounded outlet.
• 2. Inspect cord and plug: Look for heat damage, discoloration, or loose blades. Replace a damaged power cord immediately.
• 3. Clean coils and filter: Dirty condenser coils or filters can cause high compressor load. Clean both indoor and outdoor coils and ensure unobstructed airflow.
• 4. Reset unit: After cleaning and verifying power, unplug for 10 minutes, then restart. If E5 returns quickly, internal components may be failing.
• 5. Advanced checks (technician recommended): Measuring compressor current draw and checking the run capacitor requires electrical skills and proper tools. If the compressor is locked or drawing excessive current, it may need replacement.

Recommendation: Because E5 often indicates an electrical or compressor issue, contact a qualified technician if basic cleaning and power checks do not resolve the error.