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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 Check the Filter: 90% of FLO codes are caused by a dirty filter. Remove it entirely and reset the breaker. Verify Water Level: If the water is too low, air gets sucked into the pump, causing a "lock." Inspect the Pump: …

Click a question below to jump to the answer: Why won’t my Sundance spa heat? What do Sundance error codes mean? Why does my GFCI trip? Why does my pump run on its own? Why is my display acting strangely? Why don’t the spa buttons respond? Why are power connections burned or melted? Helpful tips most Sundance owners aren’t told Why won’t my Sundance spa heat? Symptoms: Heat light on/off, no water heating, error codes like FLO or FL. Causes & Sundance Fixes: Pressu …

Hot Tub & Spa Circuit Board Problems: Symptoms, Causes, and Fixes Click a question below to jump directly to the answer: Why will my 220-volt spa not heat? What do error codes or blinking dots mean? Why does my GFCI trip when heating or turning on? Why does my pump turn on by itself? Why does the wrong function turn on when I press a button? Why is the display acting strangely or some buttons don’t work? Why don’t the spa-side buttons respond? Why are power connections burned or …

Spa Troubleshooting Guide Hot tub circuit board problems can cause a wide range of confusing symptoms—from no heat and error codes to pumps turning on by themselves or GFCI breakers tripping. This guide explains the most common circuit board–related issues, what causes them, and how to safely diagnose the problem before replacing parts. The goal is to help you understand what your spa is doing and why, so you can make the right repair decision with confidence. Click a question below …

Safety First This test involves live high-voltage electricity (240V). If you are not comfortable working with live power, please contact a licensed technician. Always wear rubber-souled shoes and ensure the area around the spa is dry. Step 1: The "Call for Heat" Test Before testing the heater, you must ensure the spa is actually trying to heat. Increase the temperature on your control panel to its maximum setting. Listen for a distinct "Click" from the control box. This is the relay engaging. L …