Why did it stop condensing water?

SOURCE: Fan runs, all controls work compressor does not run.

It sounds as if the unit has lost it's refrigerant charge. Take to small appliance repair for confirmation, but it probably leaked out.

SOURCE: Unit fan is running but the compressor is not.

Hi,
It could be a bad compressor, circuit board, or maybe even a sensor or dehumidistat...
Here is a tip about dehumidifiers that run but do not extract water from the air..

Dehumidifier is running but no water is in bucket
http://www.fixya.com/support/r4662409-dehumidifier_running_but_no_water_in

heatman101

SOURCE: fan runs but does not collect water

It sounds as though the compressor is not running or the machine is low or out of refrigerant.

SOURCE: FAN AND COMPRESSOR START. HUMIDITY SET AT 30,

Rather than have you disassemble the cabinet to get to the coils, I want you to do an "At Home Test".

Move the dehumidifier to a bathroom that has a shower. Plug it in, Turn it ON and set the humidity level at 30%. Turn the shower on to medium hot (enough to generate some steam. Do Not turn On the bathroom exhaust fan. As you leave the bathroom close the door. Wait 15 minutes and return to the bathroom. Turn the shower OFF and inspect the unit's water collection bucket for water. If you find any, the unit is working as it should. If you don't find any water, it may be that the humidity sensor has failed or the air intake filter is clogged. In which case, remove the filter and clean it. If it's the sensor, unless you are really DIY savy, I'd recommend buying a new dehumidifier. As finding the part (your unit was made by Fedders), the cost of the part and the labor involved, to me, out ways repairing it.

Now, on the positive side ... If you saw water in the bucket after the bathroom test. It may simply be, that at this time, there is not enough humidity in the room air (even at 30%) to trigger the sensor. If the unit is in a basement, the air temp (60 degrees or lower) will affect it. As the temperature at floor level (where the unit is) is 5 to 8 degrees colder than the air temperature. Dehumidifiers don't work well in cold temperatures.

Hope this helped you to troubleshoot and solve the problem. Please let me know. Thanks.

SOURCE: the dehumidifier does not collect any water, the

There are 5 basic, yet 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%. If you have a manually
controlled model, set the humidity extraction level on Maximum.

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
problem.

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.

I hope this helps you to troubleshoot and solve the problem.