TCL Humidity Sensor Short / Open

Dehumidifier displays F4 and may not control humidity correctly.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Open-circuit humidity sensor, Shorted sensor element, Damaged sensor harness, Corroded connector

Safety: Unplug the unit before accessing the control panel.

Locate humidity sensor: Usually mounted near the air intake or on a small board behind the front grille.
Inspect sensor: Look for physical damage, corrosion, or broken wires.
Reconnect: Reseat the sensor connector on the main PCB.
Replace sensor: If F4 persists, replace the humidity sensor assembly with a TCL-approved part.

Medium 3/5

Humidity Sensor Assembly

Check Price on Amazon

We may earn a commission from links on this page.