If your breaker is tripping or your hot tub isn’t heating, you may have a bad heater element. We’ll walk you through the steps to determine if the cause of your problem is the heater assembly, heater element or another hot tub component.
Before getting started, it’s important to shut off all power to the hot tub at the service panel.
To test if a bad heater is causing your tripped breaker, 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. Find a replacement heater element.
Hot Tub is Not Heating
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.
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.
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.
Alternate Testing Method
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.
Replacing a Bad Heater Element
Once you’ve determined that the heater element is bad, you now need to decide if you need to replace just the element, or the whole heater assembly.
If the heater assembly is more than a few years old, it is best practice to replace the whole heater. Over time, corrosion and scale can deteriorate the heater assembly.
Need help finding a replacement heater or heater element? Email us a photo.