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Re: ice on coils
The short answer is "yes but maybe not for much longer!"
If the bucket is filling up with water it's probably working OK. Have you selected "continuous" instead of, say 60% ?
If the bucket isn't filling up with water then maybe the intake filter is clogged with fluff, preventing new moist air from getting to the cold coils and being extracted. Or maybe the fan isn't running?
I hope this info will be a useful starting point for you.
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Hello Bernard, thank you for your post!
I see that you are experiencing an issue with the Frigidaire dehumidifier, FAD704DWD, compressor consistently being on. This could be a possible issue with your control panel or sensor. Since it could be any one of these underlying issues I would suggest contacting the manufacturer for further assistance. Hopefully this information is helpful to you. -Matt
when ice forms on an evaporator unit (coil) there is an indication of internal problems with the unit. IT may occur if there is insufficient air flow ( dirty or fan speed to low ) but when this happens the thermostat just orders more gas through the tx valve and so more ice is formed then the thermostat reads it as too cold and so cuts the gas flow back by controlling the operation of the tx valve
Water from a dehumidifier will depend on the atmosphere humidity so the lower the humidity reading the less water collected
However I suggest that you have a technician check it out as the compressor start/run capacitor may be faulty and that is why the compressor is not getting hot as it may not be running properly
Impeded air flow. This causes the dehumidifier to run constantly as the humistat never reaches it setpoint as there is limited or no airflow over the coils. Even with a filter, the cooling coils can become clogged and render airflow restricted or non-existent. Check and correct as necessary.
A low refrigerant charge. Systems can leak over time and become low on charge. This causes extended period of running and the resultant freeze-up. If the coils and filter are clean, have the system checked for proper charge of refrigerant.
Assuming this isn't just a weather change, it probably needs cleaning. The unit is supposed to run the fan without the compressor intermittently to give the cold coils a chance to warm up a bit so the little bit of ice that normally forms can melt off. But once they get dirty, this melting and runoff is impeded. Spray some formula 409 (or similar) on the coils and rinse thoroughly. It is also possible that the unit is not switching over to run the fan only (without the compressor). This could be due to a bad temperature sensor, or it may be dirty or corroded so it thiinks the coils are a bit warmer than they really are. If you can find this sensor (it's usually attached to the coils with a little spring clip) see if you can't clean up where it makes metal contact (thermal contact) witht the coil. Good luck.
It's cold outside. If the temperature is too low, the cold coils will just frost up and you won't get much water 'pulled'.
Check to see if the cold coils actually are getting cold when the unit is running and the control is set to cause the compressor to work-not just the fan.
If the coils are cold and full of frost or ice, the room is too cold for the dehumidifier to work. You'll have to raise the temperature of the room or wait for warmer weather.
If the coils never get cold, the compressor might be bad or the unit might have lost its freon.
I wonder, though, if it's just too cool and dry right now for a dehumidifier to be pulling more moisture out of the air.
Hope this helps!
The compressor will not start when it is hot or it is no longer bleeding the pressure off fast enough on the high side of the refrigeration system and it cannot start under the load. The start relay and capacitor could also be bad...that would give the same symptoms...
unplug and take unit apart,blow out dust then carefully spray some cleaner-degreaser on and wash both condenser and evaporator coils,then let dry throughly, try not to soak the electrics too much a little will dry, let dry throughly then start it and leave it run a few minutes carefully touch top of compressor head,if quite warm and one line isn't hot and the other line isn't cold entering and exiting the compressor and evap coil starts to ice again you may be low on freon(refrigerant)