E06 appears and the spa shuts down or will not start; often after a power surge or lightning storm.

Safety first: Unplug the spa before removing the control box cover or keypad panel.

• Hard reset:
  • Unplug the spa for at least 10 minutes.
  • Press and hold any button on the keypad for 10 seconds (with power disconnected) to discharge residual power.
  • Reconnect and test.
• Check keypad cable:
  • Inspect the keypad ribbon cable from the top control panel to the control box.
  • Ensure it is fully seated and not kinked or damaged.
• Inspect control box for moisture:
  • Open the control box and look for condensation, corrosion, or water marks on the main control PCB.
  • If moisture is present, dry the area gently with a hair dryer on low heat and allow 24 hours before reapplying power.
• Persistent E06: If the error returns after drying and reseating cables, the control PCB is likely damaged. Replace the complete Avenli control box assembly with the correct model for your spa.