Safety first: Unplug the spa before inspecting the blower or air lines.

Check air intake:
- Locate the air blower intake grill on the control unit.
- Remove any debris, leaves, or obstructions.
Inspect for water ingress:
- Listen for sloshing sounds inside the blower housing.
- If water is suspected inside the blower, do not operate it. The blower assembly must be removed, drained, and likely replaced.
Allow cooling:
- If the blower has been used continuously for a long period, its thermal protector may have tripped.
- Allow at least 30 minutes with the spa off to cool, then retry.
Test blower: After cooling and clearing the intake, reconnect power and briefly test the bubble function. If E09 returns immediately, the air blower motor or its thermal protector is likely defective.
Replace blower assembly: Install a compatible Avenli air blower assembly if the motor is seized or repeatedly trips overcurrent.

E09 displayed and the bubble (air) function will not start or stops abruptly.

Possible Causes