Home has 57% humidity have one on the furnace do I also need a stan alone? my standalone is mod # 853203

That would depend upon the size of the dwelling. If it is a smaller, open-concept type of place, a stand-alone will work fine. If it to operate unattended, you would need to have a drain available to collect the moisture collected so the unit would not fill up and shut off. If the place is larger or has many rooms where air flow is restricted, then the humistat is the better option, since it will use the homes HVAC system to recycle the air and remove the excess humidity. Also, since the A/C coil in the air handler is already connected to a drain, moisture removal becomes a non-issue.

dehumidifiers need humidity to work so check that the a humidity of the room area has a readable humidity level for it to work
if the humidity is over 50% and it is not working then maybe the ac part is not working properly

Probably some glitch with the sensors. I recommend taking it to a service center.

Make sure your exhaust pipe to the outside isn't clogged. That is where the humidity is probably coming from.

Set the temp level at whatever point your home's temperature is now. Lower the humidity level to 35%. If you don't have an LED screen on your unit, set the manual control to maximum.This way, you will extract the maximum amount of humidity and make your home more comfortable.

Hope this helped you. Please let me know. Thanks.

mempandora, the humidity level that you set on the unit may be to high. In which case the unit will only maintain that level, rather than remove any moisture/humidity. Lower the setting to 35% or minimal, if your unit does not have an LED display. In addition, the air intake filter probably needs cleaning and the coolant coils need to be wiped down and cleaned. The latter is the only part that will require some partial dismantling of the dehumidifier's cabinet. Also, it is imperative, to maintain a minimum of 12" clear air space all around the unit. And finally, the ambient air temperature at floor level may be affecting the operation. If the temperature is between 40 & 60 degrees F, the unit struggles to sense humidity. This is particularly true in a basement. As, the air at the floor is colder than the air temperature.

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

If the room tempature is close to 60, the coils may be frozen (completely encased in ice). If this is the case, move it where the water can drain off - about 1 gallon which may NOT run into the drain bucket.
I out mine over the floor drain.
Turn off and it will defost over night.
Only specially made dehumidifers work below a room temo of 60 degrees (the temp of a basement in winter).
Does it need to be running? A digital humidity sensot from Radio Shack is cheap and may tell you the humidity is OK - only 50% or less.

Possibly the primary humidity sensor behind right side grill. Unit MUST be unplugged from outlet. Take right side grill out, unplug sensor from wire socket and plug back. If no help, you need new sensor.

Yes, but they are expensive! The unit is mounted into your air handler & a humidistat installed. Walmart dehumindifier a lot cheaper. I use one on my 1600 cuft home real well. You can set humidity level, unit will shutoff at that level. They come with an internal tank & can be plumbed to an external drain. Winter humidity should be @ 49%. Dehumidifiers also create hot air.

I am having the same problem with mine and it has started freezing up for no reason. Did you get any answers