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They don't have a way to run just the fan. Dehumidifiers don't normally have a fan only option. That would be kind of like having a DVD player not hooked up to a TV, you put a disk in and it might start-up (spinning) in autoplay mode put you can't see it so there is no benefit. If you are just trying to circulate the air in the room a small fan would work much better.
On my particular model (Keystone KSTAD70A) the circular arrow button toggles the continuous mode. What this does is keep the dehumidifier running even after the target humidity is reached... this is particularly usefull when you are trying to dry out a room that got flooded (i.e. basement after a bad rain, or a bathroom that had a plumbing issue) before mold sets in... once that happens all is lost... :)
I can only assume that it would be the same function on most models.
According to the Owner's Manual for your model, the fan will run continually, if the unit is set in continuous mode or if the unit is in defrost mode. Once the unit senses a rise in the humidity level, the compressor will start up again. Also, a dirty or clogged air filter will cause the fan to run more that it should.
Hope this helps you troubleshoot and solve the problem.
Hi Fred, let me see if I can assist you. 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.
Most dehumidifiers have a defrost mode in which the compressor is turned off to give time for the frozen water to melt. The freezing problem ocurrs when the unit is used in very cold weather. Check your manual to see if this unit comes with automatic defrost mode. If it does, it would appear that it is not operating correctly and you can request warranty service. If no defrost mode is available, then your only option is to heat up the room in order to use the dehumidifer within its limit of operation. Some units can operate as low as 36 F, but most units cannot go that low. Find out what your unit's specs are from the manufacturers web site.
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