Frigidaire dehumidifier compressor not shutting off when turned off AND compressor not running 

Three years later, and a completely different brand of dehumidifier but I just found your video. I've only replaced relay's when they've blown up and are easy to spot but that's not always how the fail and your diagnosis completely makes sense. Glad I don't have to try to find a new main control board (discontinued), try to diagnose/replace the brains of it (my initial thought, and should probably involve an oscilloscope that I don't own), or spend $300 for a new dehumidifier! Thank you! Relays are cheap and easy to solder, just be sure to use flux!

Worked like a charm thank you! Did not even have to replace humidity sensor or relais(yet)..was somewhat surprised how well the unit was built..def worth repairing

Saved me from having to buy a new one, thanks so much for posting this, I thought our machine was possessed when it ran even when switched off. I followed your advice, sorted👍

Sweet! Ours just started not turning off the compressor and I think it's a slightly older variant on this series. Thanks for posting this video!

Thank you very much for taking the time to make and post this!

Hey, thanks for the video! Not sure if it was the ground or the relay,but working for now!

Thanks for the video. I have a the same dehumidifier lasted about 5 years. It's not working properly so I check the capacity and it's OK but didn't know about the relay or the sensor.

Thanks, this was helpful. I had already replaced the humidistat so the culprit was definitely the relay. As you said; when I touched it, it clicked and became unstuck in the on position. I assume it will stick again someday and I may need to solder a replacement relay to the board. My unit has been in use for about ten years now so some occasional repair is to be expected. Otherwise, it has been a great machine and I certainly got my money’s worth.

Thanks a bunch. Had tried the grounding screws as you had shown. It was the relays. My wife thinks I'm a genius.

My LG is doing the same thing - compressor runs until you unplug it, regardless of power panel display or humidity level. Relays don't fare well in wet conditions. They also are mechanical devices and the contacts tend to burn or corrode either making continuous contact or none at all. Thanks for sharing!

You're the man. Having the same issue. Thanks so much check capacitors they're fine

Thank you so much for sharing your find! You solved my problem (relay connection)!! My husband thinks I’m a genius 😉

The glass body component should be a diode, might just be a common 1N4148 type but hard to say. These are common for protection or other low voltage circuit tricks. Not sure what it would be doing on a humidity sensor board. It looks like the leads corroded away which is strange, but maybe it's constantly exposed to condensation. The leads on components like that are usually a type of iron alloy which explains the red rust residue. I have a similar humidifier that I found with the compressor stuck on and it's likely the stuck relay as well. Thanks for the video showing what to expect and giving me hope that it's actually serviceable. A lot of things are built so proprietary and completely unserviceable now. The contacts are worn in the relay and starting to weld themselves together. Maybe you can get lucky and it works for a while, but it's likely to happen again. It's PCB mounted for the coil connections to trigger it, but that might be 2-4 leads and you just have to heat up those connections and gradually pull it out without damaging the PCB.

Thank you, this solved the problem I was having with my Edgestar Dehumidifier. Relay connection must have shook loose.

Thanks for posting. Saved us from having to buy a new one!

Thks I'll try that to stop my compressor!

Worked! Thanks for posting...

Thank you! This worked.

For anyone with this style Frigidaire dehumidifier that is having the compressor won't turn off while powered off issue and are sick of trying to hit the relay each time. The style compressor relay these use is SFK-112DM. Four solder points on the bottom of the board.

I tap the side where the relay is located and it shut right off.