Error code
Midea / Water heater
C4
Vent blockage.
What it means
Vent blockage.
This explanation is shared only by models whose manufacturer documents the same code, meaning, and guidance.
Manufacturer guidance
- Stop use and have the vent checked and cleared by qualified service.
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.