Dehumidifier displays E7 and stops operation

Safety: Unplug the unit before removing the water tank or accessing internal parts.

• Check water bucket: Remove the tank and empty it completely. Clean any slime or mineral buildup that may prevent the float from moving freely.
• Inspect float mechanism: Many Inventor dehumidifiers use a magnetic float and reed switch or an electronic level sensor. Verify the float moves up and down smoothly. Clean the float chamber with warm soapy water and rinse.
• Reinstall tank correctly: Make sure the tank is fully seated. Some models have a small lever or pin that must be depressed by the tank to indicate presence.
• Check float switch wiring: If accessible, locate the float switch or water level sensor and inspect the wiring harness and connector to the PCB. Reseat the connector.
• Replace water level sensor: If E7 persists and the float moves freely, replace the Inventor water level sensor / float switch assembly.
• PCB fault: If a new sensor does not resolve the error, the main PCB input circuit may be faulty and require replacement.