- Turn the appliance off and isolate power immediately.
- Check for visible water around hoses, seals, trays, or the surrounding floor area.
- Do not restart the appliance until the leak or overflow cause has been checked.
The leak sensor detected water. On the GE PF50S10FPY, this code relates to the water heater and should be interpreted together with how the appliance is behaving right now.
- The water heater displays F78 instead of normal status information.
- The current cycle, function, or startup sequence may stop, pause, or behave differently than expected.
- The same code may return after a reset if the underlying issue is still present.
- A real leak, overfill condition, or water collection in a safety tray or base.
- A hose, seal, valve, or level-control problem allowing water into the wrong area.
- Look for recent installation, transport, or plumbing changes that could have disturbed seals or hoses.
- Check whether the code appeared after oversudsing, incorrect detergent use, or overfilling.
- If the same code returns after drying out, the underlying leak source still needs repair.
- Water and mains electricity are a serious risk together, so isolate power before inspecting anything.
Arrange service immediately if F78 is linked to active leaking, repeated flooding, or visible hose, valve, or seal damage.
Can F78 clear after a reset?
Sometimes a temporary glitch clears after one full reset, but a repeated return usually means the same underlying issue is still there.
Should I keep using the appliance if it works again briefly?
Only if the code stays away and the appliance behaves normally. If the same code comes back, stop and move to service or more targeted diagnosis.