Frigidaire Dehumidifier F2 Code: Humidity Sensor Fix

Quick Answer

An F2 code means your dehumidifier has lost contact with its humidity sensor. Nine times out of ten, this is caused by a failed sensor module or a loose wiring connection behind the front grille. You can often fix this by reseating the sensor plug or replacing the small sensor component.

If you just let this ride, the room stays damp and the unit runs the fan uselessly while the compressor sits locked out. I've seen people do that for weeks and end up frying the control board on top of the original sensor problem. The sensor itself is usually under $25 and the whole fix takes maybe 30 minutes. Don't let a cheap part turn into a board replacement.

FrigidaireDehumidifierSeverity: moderate92% DIY Success

Time to Fix

15–45 min

Difficulty

beginner

Parts Cost

—

Tools Needed

Phillips #2 screwdriver, Compressed air canister

What Does the F2 Code Mean?

So the F2 fires when the voltage coming back from that humidity sensor is outside the range the board expects. Basically the board is asking 'hey, what's the humidity?' and it's getting either silence or garbage back. I've seen this most in basements and garages where dust and pet hair coat everything over time. Good news is it's usually not the board.

Most Likely Causes

Based on aggregated repair data, here is the probability breakdown for this error code:

Defective Humidity Sensor80%

Loose Wiring Connection15%

Control Board Failure5%

Symptoms You May Notice

Display is locked on F2 and won't budge even after you power cycle it.
Fan spins and sounds totally normal, but there's zero water in the bucket after hours of running.
Compressor never kicks on. You'll notice the unit is quieter than usual since the compressor makes that low background hum you're used to hearing.
Buttons on the panel work for fan speed or timer but humidity target settings don't seem to do anything.
Room stays damp or even gets more humid despite the unit appearing to run.

Can you reset a Frigidaire dehumidifier to clear the F2 code?

Pull the power cord from the wall outlet, don't just use the power button. Press and hold the Power button on the unit for 30 seconds while it's unplugged to drain residual charge. Wait at least 10 minutes total. Plug it back in. If F2 doesn't return, you're good. If it comes back within a few seconds, the sensor circuit is still broken and a reset won't fix it, you need to diagnose the hardware.

Tools Required for Diagnosis

Phillips #2 screwdriverCompressed air canisterSmall needle nose pliersFine sandpaper or pencil eraser for cleaning corroded connector pinsFlashlight or work light

Diagnostic Checklist

Follow these steps in order. We start with the easiest external fixes before opening up the machine.

Frequently Asked Questions

Can I run my dehumidifier while the F2 code is showing?

Honestly, no. The compressor is locked out when F2 is active so the unit isn't actually dehumidifying anyway. It might sound like it's running because the fan can still spin, but without the compressor you're just moving damp air around. And if somehow it did run without sensor feedback, it wouldn't know when to stop, which means potential ice buildup on the coils or the compressor running non-stop until something burns out. Don't ignore this one.

Where is the humidity sensor located on a Frigidaire dehumidifier?

Almost always right in front of the evaporator coil assembly, behind the front intake grille. The idea is that incoming air passes right by the sensor before hitting the coils, so the board gets an accurate humidity reading. It's usually a small black or white plastic housing, maybe the size of a large postage stamp, clipped or screwed to the inner frame. Pull the front grille off and look toward the evaporator coils. You'll spot it pretty fast.

Does an F2 code always mean I need to buy parts?

Not always. Try the hard reset first, then reseat the wiring connector. Probably 25-30% of the time it's just a loose plug or a dusty sensor that compressed air fixes. But if the unit's been running a few years and the reset doesn't hold, yeah, you're probably buying a sensor. Good news is they're cheap, usually under $25, and you can swap one in 20 minutes with just a screwdriver. Way better than a service call.

Is the F2 code different from the F1 code?

Yeah, totally different faults. F1 is the temperature sensor, the thermistor that monitors coil temp to prevent freezing up. F2 is specifically the humidity sensor. They often share the same wire harness and sit physically close to each other, which is why people mix them up. But the board tracks them completely separately. If you're somehow seeing both F1 and F2 at the same time, that usually points to a wiring harness issue affecting both sensors, or in rare cases the control board itself going bad.

How long does the repair take and what does a humidity sensor actually cost?

The sensor part runs $15-25 on most appliance parts sites. The repair is 20-30 minutes if you've never done it before, probably less once you know where everything is. You remove the front grille, unplug the old sensor, unclip it from the bracket, clip the new one in, plug it in, done. No soldering, no special tools beyond a screwdriver. Honestly this is one of the easier appliance repairs out there. A service call would cost you $80-150 just for someone to show up and do exactly this.

Models Known to Experience F2 Errors

This repair applies to most Frigidaire dehumidifiers with this error code. Common model numbers include:

FFAD7033R1, FFAD5033R1, FFAD3033R1, FFAD7033W1, FFAD5033W1, FFPD7033R1, FAD704DWD, FFAD2533R1

Written by

Raj Patel

HVAC & Water Systems Specialist · 15 years experience

Last verified for technical accuracy on March 17, 2026