Error code
GE / Water heater
F18
Current transformer wiring is incorrect.
What it means
Current transformer wiring is incorrect.
This explanation is shared only by models whose manufacturer documents the same code, meaning, and guidance.
Manufacturer guidance
- Arrange service or contact the installer to check the electrical wiring.
Manufacturer source
Models documented with this signal
Select your exact model below to open its manufacturer source. Manual editions and model revisions can differ.
If there is a safety risk, stop using the appliance and follow the manufacturer’s instructions.