Dehumidifier displays F0 and will not operate normally

Safety: Unplug the unit before inspection.

Steps to address F0:

• Reset: Unplug for 5–10 minutes, then plug back in. If F0 returns, proceed.
• Access control board: Remove the control panel cover to expose the main board and sensor connectors.
• Identify sensors: GE dehumidifiers typically have multiple thermistors: room/ambient, evaporator, and sometimes discharge or defrost. Each connects to the board via 2‑wire plugs.
• Check all sensor plugs: One by one, ensure each sensor connector is fully seated. Look for corrosion or moisture on pins.
• Inspect harnesses: Follow each sensor wire to its probe. Check for cuts, pinches, or broken insulation.
• Test sensors (if possible): Disconnect each thermistor and measure resistance at room temperature. Replace any that read open, shorted, or drastically different from the others.
• Replace main board: If all sensors test good and F0 persists, the main control board sensor circuit is likely defective and should be replaced.

Tip: Label each sensor connector before unplugging to avoid mixing them up during reassembly.