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Home / Troubleshooting a Hot Tub GFCI

Troubleshooting a Hot Tub GFCI

Troubleshooting a Hot Tub GFCI

The GFCI is a life saving equipment that protects users from experiencing even the slightest electrical currents. It has the ability to detect potentially dangerous currents and quickly disconnect the power in less than half of a second. However, continuous trips can be a problem for hot tub users, as it indicates that there are problems causing it to trip. To solve this problem, here’s a step by step guide on how to troubleshoot the GFCI of your spa.

First step: Disconnect all the wires going to the heating element

electrician8The heater of your spa is the common culprit why the GFCI trips. Meaning, you’ll have to start by inspecting the heating element of your hot tub. Some heaters can be unplugged from the main control box of the spa. If you have the ability of doing this to your hot tub, then unplug it. If not, then just disconnect all the wires of the heating element and head over to reset the GFCI. If all the components of your hot tub begin to work without tripping the GFCI, then you have found the problem. All you need to do now is to replace or repair your faulty heating element. However, if it still trips after doing this first step, then proceed to step four for further instructions.

If disconnecting the heater element from its main power source is impossible, proceed to the second step. However, if you think that you can’t handle the problem by yourself, we install and provide services for hot tubs depot .

Second Step: Inspecting the heater element if it shorted

Before doing this, you’ll need to DISCONNECT THE POWER OF YOUR SPA FIRST.

tub9In this procedure, you’ll need to inspect the heating element for any possible short circuits using a multi-meter. Put the selector dial of your multi-meter on Ohm settings. Place one of the test-leads on post #1 or #2, and place the other lead on “A”. By doing this correctly, the needle should not be getting any reading or it should not be moving at all. It will indicate that your heater element is shorted if it acquired reading from your test, and it needs to be replaced.

Third Step: Dry fired heater element

The insufficient water flow is mainly the cause of a “dry fire” heater element, as it will make it look burnt or charred. To prevent this from happening, you’ll have to perform these checks on your hot tub.

  • Look for clogged, dirty or old filter that can become a hindrance to the water flow, and replace it if needed.
  • You’ll need to recheck the valves and open it after cleaning the filters or draining the water of your spa.
  • Inspect if all jets are working as this can cause water flow issues.
  • Look inside the control box and search for the heater contactor. It should not be arced shut due to chattering.
  • Ensure that there’s no air lock problem as it can cause dry fire. Let the air escape by opening the valve closest to the pump or just loosen the union attached to the pump.

Fourth Step: Air blower or ozonator suffered from water flooding

The water flooding the air blower or ozonator of your spa can be another cause of GFCI trips. To solve this, inspect the valve that is connected in the same line as the air blower for any failure, or monitor the water level of your spa if it goes above the recommended level. You may need to replace the affected water blower and also the valve. The Ozonator is also equipped with an in-line check valve. It should be attached higher than the water level, as the Ozonator will cause the GFCI to trip if the water back up into this component.

Take note that shorted motors, circuit board and electrical wirings can also cause the GFCI to trip. Although this is a rare occurrence, there’s still possibility that your spa is suffering from this problem if the above steps didn’t solved the problem.

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