E08 error and the spa stops heating; may occur when using the spa in very cold weather.

Safety first: Do not attempt to operate the spa outside the temperature range specified in the Avenli manual.

• Verify environment:
  • Check the outdoor temperature; many Avenli spas are not designed for operation below approximately 4°C–5°C (39°F–41°F).
  • If below this, allow the environment to warm or move the spa to a more sheltered location.
• Insulate control area:
  • Ensure the control box compartment is closed and any factory insulation is intact.
  • Avoid blocking ventilation openings.
• Check ambient sensor:
  • Inspect the ambient temperature sensor for damage or dislodgement.
  • Make sure it is not directly exposed to wind or ice.
• Reset and test: After environmental conditions improve, unplug the spa for 5 minutes, reconnect, and test. If E08 appears even in moderate temperatures, replace the ambient sensor.