E09 error code appears; GFCI on the power cord may trip frequently when heater or bubbles are activated.
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Possible Causes
How to Fix / Troubleshooting
Safety first: If the GFCI trips repeatedly, do not continue to reset it. Unplug the spa immediately. Water and electricity together are extremely dangerous.
- Visual inspection: Check the exterior of the pump/heater unit for cracks, leaks, or signs of water inside the housing (fogged display, condensation).
- Dry environment: Move the pump/heater unit to a dry, sheltered location. Allow it to dry for 24–48 hours. Do not use heat guns or hair dryers directly on the housing.
- Check connections: Ensure all hose connections to the pump/heater are tight and O-rings are in place to prevent leaks onto the electronics.
- Test GFCI: After drying, plug the spa in and test the GFCI using its TEST and RESET buttons. If it will not reset, the cord set may be faulty.
- Retest operation: Fill the spa to the correct level and run filtration only. If the GFCI trips when heater or bubbles are turned on, there is likely a ground fault in the heater element or blower.
Warning: Ground faults are serious safety issues. If E09 or repeated GFCI trips persist, discontinue use and have the pump/heater unit professionally inspected or replaced.
Repair Difficulty
Required Part
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