An Et temperature-difference alarm with visible frost often starts with airflow and defrost checks before sealed-system conclusions.
Why this matters
Ice can block evaporator airflow and create a large temperature difference even when the compressor still runs. A complete manual defrost is both a diagnostic step and a temporary recovery.
Tools and materials
- Cooler for contents
- Towels and shallow pan
- Flashlight
- Soft brush or vacuum for accessible dust
What I found and what remains
- Record the conditions. Note cabinet temperature, alarm timing, fan sound, frost location, and whether the door seals.
- Power down fully. Unplug the refrigerator, remove contents, and leave the door open for 24 to 36 hours.
- Protect the floor. Use towels and a pan; melting evaporator ice can release more water than expected.
- Do not chip ice. Sharp tools can puncture an evaporator or refrigerant line.
- Restart empty. Allow the cabinet to pull down while observing fan operation and alarm recurrence.
- Inspect airflow if the alarm returns. On the Yeego YEG-BS24, persistent recurrence would justify inspection around the rear evaporator/fan panel and temperature sensors.
Common mistakes
- Using a heat gun near plastic or refrigerant tubing
- Restarting before hidden ice melts
- Packing bottles against air channels
- Assuming a defrost that works once permanently fixed the cause
Know your limits
R600a refrigerant is flammable. Sealed-system work, refrigerant leaks, compressor electrical work, and internal wiring repair belong with a qualified appliance technician.
Start with the diagnosis. Work safely, use the current product label or manufacturer instructions, and stop when the project moves beyond your tools, experience, or comfort level.