Frigidaire Dehumidifier EC Error — How to Fix

What Does This Error Mean?

Frigidaire Dehumidifier EC error indicates an electrical fault or a wiring/communication problem between the control board and a sensor or internal component. The dehumidifier stops operating when EC appears. A power reset resolves temporary EC faults; a persistent EC code usually means a sensor or control board has failed and requires service or replacement.

Affected Models

Frigidaire FFAD5033W1
Frigidaire FFAD7033W1
Frigidaire FAD954DWD
Frigidaire FGAC7044U1
Frigidaire FFAP7033T1

Common Causes

A power surge or electrical transient has caused a temporary fault on the control board
Internal wiring has become loose at a connector, causing a communication fault
A humidity sensor or temperature sensor has failed internally
The main control board itself has developed a hardware fault

How to Fix It

Perform a full power reset by unplugging for 10 minutes

Unplug the dehumidifier from the wall completely. Wait 10 full minutes to allow all capacitors on the board to discharge. Plug back in and power on. A temporary EC fault from a power glitch will clear after a full reset.
Plug the unit into a different outlet on a separate circuit

Noisy power supply from a shared circuit can cause repeated EC faults. Try a dedicated outlet that does not share a circuit with large appliances. Avoid using an extension cord — plug directly into a wall outlet.
Check for any visible damage or water near the control panel

If the dehumidifier has been running in a very wet environment or water splashed near the control panel, moisture ingress can cause the board to fault. Inspect the panel area for condensation or water trails. Allow the unit to dry completely in a warm area before attempting a restart.
Check the warranty status — EC often indicates a covered fault

Frigidaire dehumidifiers typically carry a 1-year parts and labour warranty, with some models having a 5-year sealed system warranty. Internal board and sensor faults that cause EC are covered under warranty. Contact Frigidaire support at 1-800-374-4432 with your model and serial number.
Arrange professional repair if out of warranty

If the reset does not clear EC and the unit is out of warranty, the control board or a sensor has failed and requires replacement. Control board replacements for Frigidaire dehumidifiers are available from parts suppliers (RepairClinic, Frigidaire Parts). This repair requires electrical knowledge and is best done by an appliance technician.

Frequently Asked Questions

Is the EC error on a Frigidaire dehumidifier the same as on their portable AC?

Both use EC to indicate an electrical or communication fault, and the general troubleshooting steps are the same — power reset first, then professional service if it persists. The specific sensor or circuit involved differs between the dehumidifier and portable AC products, but the user response is identical.

Can the Frigidaire EC error be caused by running the dehumidifier in very cold temperatures?

Yes — operating a dehumidifier in temperatures below 41°F (5°C) can stress the sensor circuits and trigger fault codes including EC. Most Frigidaire dehumidifiers are rated for operation above 41°F. In cold basements or garages near this threshold, a low-temperature shutdown or sensor fault is a known occurrence.