MSPA spa bubble function shuts off after a short time and cannot be restarted immediately.

Safety first: Do not attempt to bypass thermal protectors; they prevent fire and damage.

• Understand duty cycle: Many MSPA models limit bubble operation to about 20 minutes, followed by a cool‑down period. This is normal.
• Improve ventilation: Ensure the motor unit has adequate space around it and that air intake vents are clear.
• Shade the unit: Avoid placing the motor unit in direct sun or near other heat sources.
• Monitor behavior: If the blower shuts off much sooner than specified or makes unusual noises, the blower motor may be failing and should be replaced.