Symptoms
- A letter/number code flashing on the display
- Unit stops running when the code appears
- Beeping along with the code
- Code clears after a reset but returns later
Likely causes
- CommonFull water tank code (often 'FL' or similar)The most frequent code; the tank needs to be emptied before the unit will run again.
- PossibleTemperature or humidity sensor faultA sensor reading out of range triggers a protective code.
- PossibleFrost/ice sensor trippedThe unit detected icing on the coil and stopped to protect itself.
- Less commonCommunication error between the control board and displayAn internal wiring or board fault, often needing service.
What to do
- Check the manual or the manufacturer's website for the specific meaning of the code shown, since codes differ by brand.
- If it's a water-full code, drain the internal tank or connect a continuous drain hose as described in the leaking-water guide.
- Unplug the unit for 5–10 minutes to fully reset the control board, then plug it back in and restart.
- If the code relates to icing, run fan-only mode until any frost melts, then restart in cooling mode.
- Note whether the code returns immediately, after a few minutes, or after a full cycle, since that helps a technician narrow down the cause.
- If the code keeps returning after a full reset and an empty tank, the sensor or control board likely needs service.
Tools and parts
- None
When to call a pro
Call an appliance technician if the same error code returns after a full power reset and an emptied tank, since that points to a sensor or control board fault.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.