Dehumidifier Troubleshooting Tips

Dehumidifier troubleshooting is a straightforward process-most things that go wrong can be easily adjusted. A dehumidifier works by using a fan to draw in moist air. The air is passed over a refrigerated coil that causes moisture to condense onto the coils. As the moisture accumulates, it runs down the coils and is collected in a reservoir.

Your Dehumidifier Troubleshooting Checklist

• My dehumidifier won't run. First, make sure the reservoir is empty. If you plug the unit in and see a green power light, but the unit won't run, make sure the reservoir is properly inserted. Many dehumidifiers have switches or sensors to make sure that the reservoir is placed so that it won't leak. Look for these sensors and make sure the reservoir is engaging them. If your dehumidifier has a float or switch to indicate a full reservoir, make sure this switch isn't being tripped accidentally.
• My dehumidifier isn't collecting water. First, make sure the humidistat isn't set too high by adjusting it to the lowest humidity setting and running it again. Next, test the dehumidifier by placing it in a closed bathroom with a hot shower running. If you don't see water collecting in the unit after several minutes, turn the unit off and clean all dehumidifier filters and coils. If, after adjusting the settings and cleaning the unit, you still don't see water collecting, you may have a refrigeration issue. This situation will have to be addressed by a qualified technician.
• My dehumidifier has ice on the coils. Icing is an indication that the air in the room is below the rated temperature for the unit. Raise the temperature in the room or move the dehumidifier to a table or shelf, since cold air falls and lower areas of the room may be cooler. If the room is consistently cool, you may need to consider a low temperature dehumidifier.
• My dehumidifier is making a loud noise. With the unit unplugged, open the cover and check the alignment of the fan. If the fan is stuck or rubbing against the fan cowling, adjust the fan motor's mounting hardware so that the fan turns freely.
• My dehumidifier fills too quickly. A unit that fills quickly or needs to be emptied often may be located near a source of excess moisture. Check the room or area for a leaking pipe or open access to an unsealed crawlspace or other source of moisture.