Unit displays F0 and stops cooling; may restart and fail again

Safety first: Do not attempt to open refrigerant lines yourself. Refrigerant is under pressure and requires certified handling.

Steps to check (visual):

• 1. Inspect connections: With power OFF, inspect flare connections at the outdoor service valves and indoor connections for oil stains, which often indicate leaks.
• 2. Listen for hissing: In a quiet environment, listen near the tubing for any continuous hissing sound that might indicate a leak.
• 3. Check insulation: Ensure the suction line insulation is intact and not soaked with oil.
• 4. Do not run continuously: Avoid running the unit for long periods with F0 present, as low refrigerant can damage the compressor.

When to call a technician: F0 almost always requires a licensed HVAC technician to locate the leak, repair it, evacuate the system, and recharge with the correct amount of refrigerant according to the Midea nameplate.