EO
Jacuzzi
Display / Keypad Failure
Jacuzzi pool heater display is blank or shows EO; buttons may not respond.
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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
Failed display board, Loose ribbon cable between display and main board, Moisture intrusion into control panel, Low control voltage from transformer
How to Fix / Troubleshooting
Safety first: Turn off power before opening the control panel.
Steps to troubleshoot EO:
- Check power supply: Verify that the heater is receiving proper line voltage at the input lugs and that the low-voltage transformer output matches Jacuzzi specifications.
- Inspect ribbon cable: Remove the front panel and check the flat ribbon cable between the display/keypad and main control board. Reseat both ends securely.
- Look for moisture: If condensation or water is present behind the display, dry the area and correct any gasket or cover issues.
- Replace display board: If power and connections are good but EO persists, replace the Jacuzzi display/keypad assembly.
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Repair Difficulty
Medium
3/5
Required Part
Jacuzzi Display / Keypad Board
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