E8 error, unit shuts down or runs at reduced capacity, sometimes with loud compressor noise

Safety first: Refrigerant systems are sealed and under pressure. Do not attempt to cut or open refrigerant lines yourself. This work must be done by a licensed HVAC technician.

• Step 1 – Basic checks:
  • Ensure filters and coils are clean and airflow is not restricted.
  • Verify that the unit is operated within the recommended ambient temperature range.
• Step 2 – Visual inspection:
  • Look for oily residue on copper tubing or around joints, which can indicate a refrigerant leak.
  • Listen for hissing sounds when the unit is off, which may also indicate a leak.
• Step 3 – Professional service:
  • If E8 persists, contact a licensed technician to check system pressures, locate leaks, and recharge with the correct refrigerant type and weight as specified on the Pro Breeze rating label.
  • The technician may need to replace the Evaporator Coil, Condenser Coil, or Capillary Tube / Expansion Device if a leak or restriction is found.

Continued operation with low refrigerant can damage the compressor; discontinue use until inspected.