Goods Scene Troubleshooting
Dreame H12 Pro – Electrolytic-water failure — F4
Dreame identifies F4 on H12 Pro as an electrolytic-water failure.
Issue meaning
What this issue means
Dreame identifies F4 on H12 Pro as an electrolytic-water failure.
Start here
First checks
Dreame recommends trying another clean-water tank. If the fault remains, professional service is required.
Inspection
Area to inspect
Clean-water tank and electrolytic-water system.
Goods Scene guidance
What to do next
Verify the tank-related cause before moving to deeper internal diagnosis; a clean-water tank replacement is Dreame's first specified component test.
Practical guidance is kept separate from manufacturer wording.