Question about Dehumidifiers
Runs but doesn't remove the humidity even when it is high?
Posted by Anonymous on
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Posted on Jan 02, 2017
SOURCE: Can't get our dehumidifer to
Bonnie, there are 5 basic, but solvable reason for what you described. Please pay particular attention to numbers 1 & 2.
1. The humidity extraction level is set to HIGH. Lower it to 32-35%.
2. Air intake filter is dirty or clogged. Turn unit OFF, & Unplug the
Unit, before removing to inspect & clean it, if necessary. If washed,
allow filter to completely dry before reinstalling. DO NOT operate
the unit without the filter.
3. Obstructed air flow. Maintain a minimum of 12 to 18" of clear air
space around the entire unit.
4. Cooling coils are dirty and need to be cleaned. Use warm water & dish washing liquid to
clean the coils. Rinse and wipe dry. Apply a light coating of WD40 to the coils.
5. Ambient air temperature at floor level is between 40 - 60 degrees.
dehumidifiers do not work well between those temperatures
(Unless, you have a Low Temp Unit). This applies mainly to
where the air temperature at floor level is colder than at shoulder level
in basement applications . Raising the unit up off the floor,
onto a sturdy table, counter top, etc, that can handle the weight
of the unit, plus a full tank of water, will usually resolve this
If none of the above solves the problem, it may be a case of the compressor needs to be recharged with refrigerant gas or that the humidity condenser sensor has failed. These things usually occur in units that are 5 years old or older. It's rare in a unit younger than that. But, it can happen.
Hope this helped you tho troubleshoot and solve the problem. Please let me know. Thanks.
Posted on Jul 09, 2011
I had the very same problem with my Zenith ZD300 dehumidifier. After getting no help from the manufacturer and realizing that it was going to cost $45 just to figure out what was wrong with it, I dismantled the dehumidifier myself in search of a solution. I suspected it was the humidity sensor, so I ordered the part off Repair Clinic website (repairclinic.com). It cost $18.20 plus shipping. AND IT WORKED!! I was so relieved that I wouldn't have to buy a new dehumidifier. It's been running for a day now, so we will see. Here's the website link:
Posted on Jul 12, 2012
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