Hot Tub Heater Element Testing

Here are the steps to determine if a hot tub heater element is bad:

1. Safety First: Before getting started, it’s important to shut off all power to the hot tub at the service panel.

2. Tripped Breaker Test: If your breaker is tripping, you can disconnect the copper tabs (or wires) from the spa pack to the heater element. Once disconnected, turn the power back on. If the breaker stays on, you’ve determined that the heater is bad.

3. Hot Tub Not Heating Test: If your breaker is not tripping but your hot tub still isn’t heating, testing voltage to the heater using a multi-meter will help determine the cause.

   • 240V Spas: With the spa on, test both of the leads on the element at the same time. If the meter is reading 240v, the element is the problem. If the meter is reading zero, the problem is with the circuit board.
   • 120V Spas: With the spa on, test both of the leads on the element at the same time. If the meter is reading 120v, the element is the problem. If the meter is reading zero, the problem is with the circuit board.

4. OHMs Test: Another way to test for a bad heater would be an OHMs test, which checks the resistance of the element. To do this, follow these steps:

   • Turn off all power to the hot tub
   • Disconnect the copper tabs (or wires) going to the heater element
   • Set the multi-meter to the OHM setting
   • Test both leads on the heater element
   • If the multi-meter shows 9-14 OHMs, the element is likely not bad. If the meter shows open, or reads nothing, the element is bad.

5. Visual Inspection: Check for any signs of corrosion or damage to the element, such as discoloration, cracking, or warping. You may also want to check the wires for any signs of damage or fraying. If you find any signs of damage, it is best to replace the element with a new one.

Remember, if you’re unsure or uncomfortable performing these tests, it’s always best to call a professional. Safety should always be your top priority.