F7
MSPA
Internal Self-Test Failure
Display shows F7; spa may not start or may shut down shortly after startup.
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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
Corrupted firmware on MSPA control PCB, Faulty internal memory, Damaged microcontroller, Severe power surge damage
How to Fix / Troubleshooting
Safety first: Disconnect power before opening the control unit.
- Power reset: Unplug the spa for at least 15 minutes to fully discharge internal capacitors, then reconnect and test.
- Check for surge damage: Inspect the PCB for burnt components, cracked ICs, or blown MOV surge protectors. If visible damage is present, the board is unsafe to use.
- Stable power source: Ensure the spa is connected to a stable, grounded outlet, preferably through a quality surge protector rated for the spa's current draw.
- Replace control PCB: F7 typically indicates a non‑repairable logic fault. Replace the MSPA main control PCB with a genuine part. Firmware is usually pre‑loaded and not user‑flashable.
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Repair Difficulty
Professional Required
5/5
Required Part
MSPA Main Control PCB
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