F15
Ideal
Main PCB Fault
Heater shows F15, often after a power cut or surge; unit may be completely unresponsive.
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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
Internal PCB failure, Surge-damaged components, Corrupted firmware, Burnt tracks due to short circuit
How to Fix / Troubleshooting
Safety: Disconnect power before removing the PCB cover. Do not touch live components.
- Visual inspection: Look for obvious signs of damage on the main PCB such as burn marks, bulging capacitors, or melted connectors.
- Check supply voltage: Confirm that the heater is receiving the correct mains voltage at its terminals (qualified persons only).
- Reset: Perform a full power reset. If F15 reappears immediately, the PCB is likely defective.
- Professional replacement: PCB replacement usually requires configuration and safety checks; contact an Ideal-approved technician.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control PCB
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