Dehumidifier Troubleshooting & Repair

What is wrong with My Dehumidifier?

The coils frost up
It runs, but no air blows out the front
The indicator light is on, but the unit doesn't run
The container fills up too quickly
The container doesn't fill
Learn more about dehumidifiers
Dehumidifier Parts

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The coils frost up

The coils you see on the back of your dehumidifier are the evaporator. When the unit runs, the coils get very cold. As the fan draws the room air over the coils, the humidity in the air condenses out of the air onto the cold coils. But, if the temperature of the air the fan draws over the coils is too cool, the humidity that condenses out of the air freezes on the coils.

To remedy this problem, you can try any of these:

  • Warm up the room the dehumidifier is in.
  • Put the dehumidifier on a sturdy table (the room air is coolest near the ground).
  • Turn the unit off until the room warms up.

It runs, but no air blows out the front

Your dehumidifier has a circulating fan that draws the room air over the coils. If there's no air movement out the front or back of the unit, the fan motor may be burned out or stuck, or the fan blade may be broken. If so, you need to replace the fan motor or the fan blade.

The indicator light is on, but the unit doesn't run

The tank may be full. Your dehumidifier has a safety device that turns off the dehumidifier when the water tank is full. Usually the tank itself either presses against a switch or there's a device connected to the tank that triggers a switch when the tank is in place and full.

If you've emptied the tank and the unit doesn't run, inspect the place where the tank rests to see if there's a switch or mechanism that's not being activated. You may be able to turn it on with a simple flick of your finger.

The container fills up too quickly

When the container fills quickly, your dehumidifier is doing its job. If the container fills quickly for many days in a row, you may want to locate the source of the humidity (for example, is there an unsealed crawl space?) and see if you can correct the problem at the source.

The container doesn't fill

If your dehumidifier doesn't seem to run often but the humidity in the room is high, try adjusting the humidistat control on the dehumidifier to a dryer setting. If the dehumidifier seems to run constantly, but there's little or no water in the container, there may be a problem in the refrigeration system. Try cleaning the unit. If that doesn't work, you can't repair the refrigeration system yourself, you need a qualified appliance repair technician to do that.

Work on these areas of an appliance may require help from an appliance repair person or other qualified technician.

find appliance parts quickly.
This easy-to-use search will help you find appliance parts quickly.
Begin by entering your appliance model number.

Where can I find the model number?
The model tag is usually in a visible location, on the front of
the appliance (not on the back). Example: LSQ8243HQ0

Warning! To avoid personal injury or even death, always disconnect your appliance from its power source--that is, unplug it or break the connection at the circuit breaker or fuse box--before you do any troubleshooting or repair work on your appliance. Also, because some components may have sharp edges, use caution while working on your appliance.

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