Question 1

the display is showing 'CH' or 'dH' and beeping, and it won't run. what does that mean?

Accepted Answer

DIAGNOSIS That's a continuous humidity sensor error. The unit's internal sensor that reads room humidity is either faulty, disconnected, or giving a nonsensical reading. FIX The first fix is a full system reset. 1. Unplug the dehumidifier from the wall. 2. Press and hold the Power button on the control panel for 30 seconds while it's unplugged. 3. Still unplugged, remove the water tank. 4. Leave everything unplugged and disassembled for at least 10 minutes. This drains residual power and resets the main board. Then plug it back in, insert the tank, and see if the error clears. IF THAT DIDN'T WORK The sensor might be physically obstructed. Unplug the unit and remove the filter. Look near the top of the cavity for a small plastic nub or vent—that's the sensor. Gently vacuum any dust off it. Do not touch it with your fingers or spray anything on it. HEADS UP If the error code returns immediately after the reset, the sensor or main control board is likely defective. The unit needs professional service. You can't fix a failed sensor yourself on this model.

Question 2

my dehumidifier suddenly turned off and now it won't turn back on at all, no lights, nothing.

Accepted Answer

DIAGNOSIS Complete power loss usually points to a tripped internal thermal fuse, a problem with the outlet, or a failed control board. FIX First, eliminate the easy stuff. 1. Check your circuit breaker or GFCI outlet—reset it if needed. 2. Try plugging the dehumidifier into a different, known-good outlet with nothing else on it. 3. Check the power cord carefully for any cuts, kinks, or damage near the plug or where it enters the unit. If you have power at a new outlet, the unit's internal overload protector might need to reset. Unplug it and let it sit for a full hour to cool down completely, then plug it back in. IF THAT DIDN'T WORK There's a small chance the bucket is not triggering the safety switch properly. Make sure it's clicked in all the way. Try holding the bucket in place firmly while you press the power button. HEADS UP If it tripped a GFCI outlet, that's a serious sign. It means moisture has likely caused an electrical short inside the unit. Do not continue to reset it. Unplug it and call LG support—this is a safety issue.

Question 3

how do you clean this thing? the manual is confusing about the actual coils and stuff inside.

Accepted Answer

DIAGNOSIS Regular cleaning is crucial for performance, and the main targets are the air filter, the evaporator coils you can see behind it, and the bucket. FIX 1. Unplug it. 2. Pull out the bucket and wash it with warm soapy water. Rinse and dry it completely. 3. Remove the air filter by pulling the tab. Vacuum it or wash it in lukewarm water. Let it dry FULLY before putting it back. 4. With the filter out, use a vacuum cleaner hose with a brush attachment to gently vacuum the aluminum fins (coils) you see. Be careful not to bend them. 5. Wipe down the exterior grille with a damp cloth. IF THAT DIDN'T WORK If performance is still poor after cleaning, there might be mold or heavy dirt deep in the coils you can't reach. You can use a can of coil cleaner foam from a hardware store, sprayed lightly onto the coils from the front, following its directions carefully. Let it foam and drain, and let the unit dry for a day before use. HEADS UP Never use harsh chemicals, steam cleaners, or pressure washers. Don't try to remove any panels to get to the back of the coils—you'll break seals and void your warranty.

Question 4

the fan on my lg 50-pint is running but no water is collecting in the bucket, it's been days.

Accepted Answer

DIAGNOSIS The compressor isn't kicking on to cool the coils and condense moisture. This could be a few things, but start with the simplest: the room might not be humid enough, or a safety timer is active. FIX First, check the room's relative humidity on the display. If it's below about和阿50%, the unit is designed not to run the compressor to save energy. Try it in a damper room like a bathroom after a shower. Also, check that the bucket is seated perfectly. If it was removed recently, the unit has a 3-minute compressor delay before it starts dehumidifying again. IF THAT DIDN'T WORK The evaporator coils might be frozen solid. Unplug the unit, pull the bucket, and let it thaw completely for 24 hours in a warm room. If it was running in a cold basement (below 65°F), that's likely the cause. Plug it back in and see if it starts pulling water. HEADS UP If the coils freeze up repeatedly, the ambient temperature is too low for this model to work properly. It's not designed for unheated spaces in winter.

Question 5

trying to connect my puricare dehumidifier to the lg app but it won't find the device during setup.

Accepted Answer

DIAGNOSIS The Wi-Fi setup process is finicky and often fails if you don't follow the exact sequence or if your phone's settings aren't right. FIX 1. On the dehumidifier, press and hold the Wi-Fi button for 3 seconds until the Wi-Fi light blinks rapidly. 2. On your phone, go to Wi-Fi settings and connect directly to the network named something like “LG_Dehumidifier_XXXX”. 3. Then open the LG ThinQ app to continue setup. Keep the phone close to the dehumidifier. 4. It will ask for your home Wi-Fi credentials. Make sure you're using a 2.4 GHz network—it will not connect to 5 GHz. IF THAT DIDN'T WORK Reset the dehumidifier's Wi-Fi module. Unplug the unit. Press and hold the Power button on the control panel for 10 seconds while it's still unplugged. Then plug it back in and try the setup sequence from the start. HEADS UP If you change your home Wi-Fi password or get a new router, you'll have to go through this entire setup process again. The unit won't reconnect automatically.

Question 6

my ud501k says 'full' on the display and shuts off but the bucket is only half full, what's going on?

Accepted Answer

DIAGNOSIS The internal float switch, which tells the unit the bucket is full, is being triggered early. This is almost always because the bucket isn't seated perfectly or the float mechanism is stuck. FIX 1. Unplug the unit. 2. Pull the bucket out completely. 3. Look inside the bucket compartment at the back—you'll see a small plastic float lever. Gently move it up and down with your finger a few times to make sure it's not stuck. 4. Re-insert the bucket, making sure it slides in straight and you feel a solid click at the end. IF THAT DIDN'T WORK There might be a small piece of debris or a spiderweb blocking the float's path. Use a flashlight to look at the slot where the float moves and a can of compressed air to blow it out. Don't use water. HEADS UP Never run the dehumidifier without the bucket properly installed. If the float is faulty and doesn't trigger, it will overflow water onto your floor.

Question 7

got an LG 50-pint and it's making a loud gurgling or water-sloshing noise, like there's a bucket inside it. is that normal?

Accepted Answer

DIAGNOSIS That's usually the sound of refrigerant moving through the coils, which is normal during startup and operation, but if it's constant and loud, the unit might be tilted. FIX Check that the dehumidifier is sitting perfectly level on all four feet on a solid floor. If your floor is uneven, you can put a thin shim under a foot. Also, make sure the water tank is pushed in all the way and seated correctly. A tank that's not fully seated can amplify internal sounds. IF THAT DIDN'T WORK The noise could be from water collected in the base pan under the bucket. Unplug the unit, pull out the tank, and tip the entire dehumidifier gently to one side over a drain or towel to see if any standing water pours out. Let it dry before plugging back in. HEADS UP A loud knocking or grinding noise is NOT normal gurgling. If you hear that, shut it off immediately—it could be a failing compressor or fan motor.

Question 8

my lg dehumidifier just flashes the red filter light even though i cleaned the filter, how do i make it stop?

Accepted Answer

DIAGNOSIS The machine thinks the filter hasn't been reset after cleaning. There's a separate reset step you have to do. FIX First, make sure the filter is completely dry and clicked all the way back into its slot. With the unit powered on, press and hold the Filter Reset button on the control panel for about 3 seconds. You should hear a beep and the red filter light should turn off. If it doesn't, try holding it for up to 5 seconds. IF THAT DIDN'T WORK Unplug the dehumidifier for a full minute to do a hard reset. Plug it back in and immediately press and hold the Filter Reset button again. Sometimes the control board just needs a fresh start. HEADS UP This model counts run hours, not dirt. You need to press that reset every 250 hours of operation, even if you haven't cleaned the filter, or the light will come on and the unit may reduce its performance.

LG PuriCare UD501KOG5 50-Pint Dehumidifier

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