Sundance Spa Heater Voltage Test | Multimeter Troubleshooting Guide

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.

1. Increase the temperature on your control panel to its maximum setting.
2. Listen for a distinct "Click" from the control box. This is the relay engaging.
3. Look for the Heat Icon (usually a set of wavy lines) to appear on the screen.

Step 2: Testing for Voltage (The "Board" Test)

1. Set your multimeter to AC Volts (200V or 750V range).
2. Open the control box and locate the two terminals where the heater wires connect to the Main Logic Board.
3. Place one probe on each terminal.
• If you see 240V: The board is working perfectly. Your heater element is "open" and must be replaced with a 6500-310 Smart Heater.
• If you see 0V: The board's relay has failed. Even a brand-new heater won't fix this; you need a Series-Specific Logic Circuit Board.

Step 3: The Resistance Test (The "Heater" Test)

1. Turn off the power at the breaker.
2. Disconnect the two heater wires from the board.
3. Set your multimeter to Ohms (Ω)
4. Place the probes on the heater wire leads.
• Healthy Heater: Should read between 9-12 Ohms (Ω)
• Dead Heater: If the screen shows "OL" or "1" (Open Loop), the internal titanium element is snapped.