UV
Master Spas
UV Sanitizer Lamp or Ballast Fault
Display shows UV or UVC and UV sanitizer indicator is off or flashing
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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
Expired UV lamp, Failed UV ballast, Loose UV harness connection, Control pack not detecting UV current
How to Fix / Troubleshooting
Safety first: Turn off power and allow the UV unit to cool before servicing.
- Check service life: Many Master Spas UV systems require lamp replacement annually. If overdue, replace the UV lamp.
- Inspect connections: Verify the UV harness is firmly connected to both the UV unit and control pack.
- Replace lamp: Open the UV housing per manufacturer instructions, replace the lamp without touching the glass with bare hands, and reassemble.
- Ballast or control fault: If UV error persists with a new lamp, the ballast or control pack UV circuit may be faulty and require replacement.
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Repair Difficulty
Medium
3/5
Required Part
UV Sanitizer Lamp
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