09
Vokera
EEPROM / PCB Configuration Error
Furnace displays 09 and will not start, often after a power surge
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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 control board memory, Incorrect PCB fitted, Electrical surge damage
How to Fix / Troubleshooting
Safety: Turn off power at the isolator.
- Power cycle: Leave the furnace powered off for at least 2 minutes, then restore power to see if the code clears.
- Check model label vs PCB: If the PCB was recently replaced, verify that the installed board is the correct Vokera part number for this furnace model.
- Inspect for surge damage: Look for burn marks or swollen components on the PCB (do not touch live parts). If damage is visible, the board must be replaced.
- Technician configuration: A qualified engineer may need to reprogram or configure the new PCB using Vokera procedures.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control PCB
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