E012
GSW
Control Board Internal Fault
GSW electronic gas water heater shows E012 and the unit will not power up after a surge or outage
Advertisements
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.
Advertisements
Possible Causes
Surge-damaged control board, Burnt PCB trace, Failed internal relay, Corrupted firmware
How to Fix / Troubleshooting
Safety: Turn off power at the breaker before opening the control compartment.
- Visual inspection: Remove the control cover and inspect the board for burnt components, bulging capacitors, or a burnt smell.
- Check line voltage: Confirm correct voltage at the board input terminals. If no power is present, trace back to the junction box or outlet.
- Reset attempt: Some GSW boards have a small reset button. Press and hold according to the manual, then restore power.
- Surge protection: If the board failed after a storm or outage, install a surge protector on the circuit when replacing the board.
- Board replacement: If E012 persists and power is correct, replace the control board with the exact GSW replacement part. This is typically a technician-level repair.
Advertisements
Repair Difficulty
Professional Required
5/5
Advertisements