E99
Intex
Critical System Error / Self-Diagnostic Failure
Control panel displays E99 and spa cannot be started
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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.
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Possible Causes
Severe PCB malfunction, Corrupted firmware, Multiple sensor failures, Internal short circuit
How to Fix / Troubleshooting
Safety first: Unplug the spa immediately and do not attempt to operate it until the fault is identified.
- 1. Power reset:
- Leave the spa unplugged for at least 30 minutes.
- Reconnect and reset the RCD/GFCI, then attempt to start.
- 2. Check for obvious damage:
- Inspect the heater pump unit exterior for burn marks, melted plastic, or strong electrical smell.
- If any are present, do not use the spa.
- 3. Environmental check:
- Ensure the unit has not been submerged or heavily flooded.
- If E99 remains: The control system is likely irreparably damaged. Replacement of the heater pump unit is usually the only remedy; contact Intex support.
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Repair Difficulty
Professional Required
5/5
Required Part
Heater Pump Unit (Complete Assembly)
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