How to Fix Balboa FLO Error (M016) | Hot Tub Tech

How to Fix Balboa FLO Error (M016)

The Problem: Your Balboa system has detected a lack of water pressure or flow through the heater tube.

Quick Fix: Remove your filter, check that your water level is halfway up the skimmer, and restart the power.

Step-by-Step Troubleshooting

  1. Check the Filter: 90% of FLO codes are caused by a dirty filter. Remove it entirely and reset the breaker.
  2. Verify Water Level: If the water is too low, air gets sucked into the pump, causing a "lock."
  3. Inspect the Pump: Ensure Pump 1 is actually moving water. If you hear a hum but see no bubbles, you may have an air lock.
  4. Pressure or Flow Switch: If the water is flowing fine, the pressure switch sensor may need replacement.
Jan 23rd 2026 SpaStore.com

Recent Posts