Question about Heating & Cooling

3 Answers

F2 error code on a Frigidaire Dehumidifier FDL50S1. Indicates a sensor failure but what sensor and how do I fix it?

Posted by on


3 Answers

  • Level 1:

    An expert who has achieved level 1.


    An expert that hasĀ over 10 points.


    An expert whose answer gotĀ voted for 2 times.

  • Contributor
  • 1 Answer

Okay. I just fixed the F2 problem on the 50S1 and this might take a bit to explain. I suspect this is a generic problem with Frigidaire dehumidifiers but this fix is specific to the 50S1 since each housing is different. Consult the wiring diagram.

F2 means there's an error with the tube temperature sensor. If you look at the wiring diagram (BTW: there's a wiring diagram inside on the back. More on that later.) you'll see the tube sensor represented.

There are three places where there are electronics on the FDL50S1: two small plastic boxes containing circuit boards on the inside lower left as you're looking in the back and under the top plate where all the buttons are. The connection to the tube sensor is under the top plate.

But wait. It's HARD to get the 50S1 open.

Here's how I did it.

The sides have to come off before the back, even though the back is screwed onto the sides. The top has to come off anyway so you take off all the screws. As I recall, there are six in the back, 3 on each side and 4 on the top. Two of the three on the sides are obvious. But #3 for each is on the inside of the bucket chamber. So you have to remove the bucket. The 4 on top are obvious.

One of the sides has 2 LEDs to show power and bucket. So when you pull that side off, be gentle and disconnect the LEDs.

The sides have a keyed flange holding them to the front. So you have to lift and pull them out once they've been unscrewed.

The order they come off is: sides, back, top. The top has the electronics IN it so it's connected to the rest of the unit with the wires as well as the screws. So you need to make sure you're gentle here, too.

Once you have the top off, you can see the printed circuit board where the electronics are. It's held on by 6 or 8 screws and comes off easily one they are removed.

Once you turn it over, the connector for the tube temp sensor is clearly marked. At least it was on mine.

Now here's the kicker. It turns out the connectors are cheap. All I had to do to fix this was pull it out and reseat it. That was it and it worked fine.


Posted on Apr 11, 2010

  • Tom Wolan Jul 07, 2012

    Thanks for the tip. I tried that out and I even went as far as to pull out and reseat all of the leads at both boards and I still ended up with the F2 error. It kicks in and runs once in a while but it spends more time in the error function than it does running. I'm purchasing a non-Frigidaire replacement today.


  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

I was able to fix the F2 error on my FDL50S1 humidifier by "tricking" the machine into thinking it had a working tube temperature sensor thermistor. My solution should be attempted after "fsteve's" solution of opening the machine and pulling out / re-seating the tube temp sensor from the main circuit board. In short - my solution is to replace the tube temperature sensor thermistor with a 1000 ohm / 1/2 watt resistor.
A thermistor is effectively a resistor that changes resistance with temperature. As such: the machine will run as long as the tube temperature connection circuit is completed with a resistance falling within a certain range. To accomplish this I cut the wire leading from the circuit board to the tube temperature sensor thermistor, separated and striped the wires (so that the metal internal wire was exposed), and connected it to a 1000 ohm / 1/2 watt resistor. This resistor can be purchased at radio shack (5 pack for $1.50). Other resistance / power resistors may work, however I know the 1000 ohm / 1/2 watt resistor to work. To connect the resistor to the exposed metal wires (that used to lead to the tube thermistor) i wrapped the metal wire around the two sides of the resistor, folded over the metal coming out of the resistor, and soldered it together on both sides. If soldering is not possible, hot glue / tape should work. I do not believe it matters which way the resistor is connected, however i would test the machine with the resistor connected prior to permanently connecting it (the machine can be turned on with the sides / back / top removed). NOTE: this will make the machine run and dehumidify, however I am unsure as to exactly how it effects the operation and safety of the machine. I have had no trouble since doing this, however I would pay extra close attention to your machine and not run it for long periods of time. Although the machine works without the tube temperature sensor thermistor, if it did not serve some purpose it would not be there to begin with.

Posted on Jun 11, 2013

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

F2 error code on Frigidaire dehumidifier model FDL50S1. how do I fix it.

Posted on Jan 22, 2010

1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

The F2 code is on in the humidity window of my Frigidaire dehumidifier? Not in manual. What does this mean?

Good Morning friend, thank you for your inquiry!
I see that you are having trouble with your Frigidaire dehumidifier displaying an error code of "F2". Typically, an "F2" error code stands for a miscommunication error. This could be a possible problem with a sensor or control panel. I would suggest performing a reset and that can be completed by disconnecting the power from your dehumidifier for roughly ten minutes. If you are still under warranty I would recommend contacting your manufacturer to see if any additional assistance can be provided. Hopefully this is helpful. -Matt

Feb 13, 2015 | Frigidaire Dehumidifiers

1 Answer

Owners manual for model fdl50s1 frigidaire dehumidifier

Good Afternoon Friend,

I understand you are looking for the owner's manual for your Frigidaire dehumidifier, model# FDL50S1. Attached is a link to your manual. Hope this is helpful.

-Best Regards-
Frigidaire Manual Search Results

Jul 04, 2014 | Frigidaire Dehumidifiers

1 Answer

Frigidaire dehumidifier has a F2 error and will not operate

Hello - Typically error code F2 indicates a sensor failed has occurred on the dehumidifier. You may want to contact your manufacturer to verify if the part is available and can be replace. Some do, some don't. Also confirm if the unit has a limited warranty on such concern.

Oct 20, 2012 | Whirlpool Dehumidifiers

1 Answer

What does code AS mean - seems to be working fine.

Hello marilu scheck - Typically error code AS indicates that a sensor failed has occurred on the dehumidifier. You may want to contact your manufacturer and then a professional they suggest to have it repaired.

Oct 03, 2012 | Frigidaire FAD704TDP Dehumidifier

1 Answer

Frigidaire dehumidifier model # FDL50S1 clicking very loudly.

If the unit is not running fully, but you have this noise, sounds like the internal fan might be the culprit. Contact your manufacturer for further options.

Aug 24, 2012 | Frigidaire Fdl50s1 Air Purifier &...

2 Answers

How to fix f2 message? what is wrong?

If the display reads "F1" or "F2", a sensor has failed. Contact your Authorized Frigidaire Service Center.

Feb 21, 2011 | Frigidaire FDF50S Dehumidifier

2 Answers

Frigidaire Dehumidifier gives F2 error code and no longer runs.

F1 is room temperarure sensor error. F2 is tube temperature sensor error.

The room sensor usually is located in the front of the condenser. The tube sensor is usually plugged in a tube near the condensor.

The tube temperature sensor (thermistor) should be about 10K ohms.

Aug 31, 2009 | Frigidaire FDL45P1 Dehumidifier

1 Answer

F7 error code- what does this mean?

Frigidaire / Westinghouse / Tappan / Gibson
Oven Fault Codes
Display Condition Remedy
F0 & F1 EOC failure Replace EOC
F2 Oven over heat Defective Sensor or EOC
F3 Oven Sensor Open Replace Sensor
F4 Shorted wire or Sensor locate short and correct it
F5 EOC failure Replace EOC
F6 EOC failure Replace EOC
F7 EOC failure Replace EOC

May 17, 2009 | Frigidaire 30 in. Electric Gallery Series...

Not finding what you are looking for?
Heating & Cooling Logo

Related Topics:

5,403 people viewed this question

Ask a Question

Usually answered in minutes!

Top Heating & Cooling Experts

Paul Carew

Level 3 Expert

3253 Answers

Dan Webster
Dan Webster

Level 3 Expert

8220 Answers

Tim Whalen

Level 3 Expert

3074 Answers

Are you a Heating and Cooling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides