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Re: Fan runs but no water, I suspect refrigerant leak,...
My experiance when I ask my Heating and air conditioning guys when they were out serviceing my home air conditionion was a resounding NO not cost effective these units are practically considered throw away,with no value after 3-5 years no matter what price range and this is true. They say the cost is purchacing and adding the valve needed to refill. Just another prime example of total waste and disposable world we live in.
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There are two major causes of a dehumidifier or air conditioner to freeze up the evaporator coil. First is lack of air flow try cleaning or replacing the air filter if it has one; make sure the fan is running and the coils are clean. Second is a low charge of refrigerant requiring a refrigerant leak check; repair and recharge. A slight overcharge will keep a dehumidifier from freezing in cooler ambient temperatures.
There are two major causes of a dehumidifier or air conditioner to freeze up the evaporator coil. First is lack of air flow try cleaning or replacing the air filter if it has one; make sure the fan is running and the coils are clean. Second is a low charge of refrigerant in which case it may be cheaper to replace the unit than have a certified repair person fix it. Make sure to recycle the old unit if you replace it.
Mike, there are 5 things that could be causing the problem you're having. So, before you ruch out to buy a new one, try troubleshooting this one first.
Turn the unit OFF & unplug it before attempting any troubleshooting
1. The humidity extraction level is set to HIGH. Lower it to 32-35%. If you have an analog unit, set the humidity extraction level knob 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.
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
If none of the above solved the problem, it ma be time to start shopping for a new dehumidifier. As repairs can often cost almost as much as a new unit.
The rings on the back, that you are referring to are the cooling cools. There are several things that can cause this problem.
1. The air intake filter needs to be removed and cleaned.
2. Obstructed air flow. Maintain at least a 12" to 18" of clear air space around the entire unit.
3. The cooling coils are dirty and need to be cleaned. You ca do this by wiping the of with a rag moistened with warm water and then wiped dry. Then a apply a light coating of WD40.
4 The air temperature at floor level is colder than at chest level. This is particularly true in base- ment applications. Dehumidifiers do not work well at temperature at or below 40 degrees F. Unless it's a Low Temperature model, which are designed for basement applications. In your case, if you're using it in a basement, raise the unit up off the floor onto a sturdy table, counter top,etc, that's strong enough to handle the weight of the unit, plus a full bucket of water.
Mechanically, there may be a small leak in one of the cooling coils, which is allowing refrigerant gas to escape and it's frosting the coils. If none of the above solves the problem for you, than I would suspect the refrigerant leak. In which case, it's less expensive to buy a new unit, than it is to repair it
I hope this helps you to troubleshoot & solve the problem..
if the compressor is really running (not just the fan) and it doesnt cool the evaporator coils then it has lost its refrigerant (likely r134a) .. thats a special job to repair.. there also has to be a leak that must be repaired .. then the system is refilled and possibly a dryer added .. if the fan is running only, then there are many other possibilities .. .. you shouldnt run the unit long since part of the cooling for the compressor comes from the refrigerant .. it will shorten its life if run a long time without it ..
Possibly lost refrigerant from system- check warm air is coming out of machine. Otherwise it could be dirty filters, and not getting enough air over evaporating coil. Other than this, replacing parts is usually more expensive than buying a new dehumidifier :(
Almost all dehumidifiers now have automatic defrost, but if you are seeing frost is just one small area, it means there is a refrigerant leak. Check your warranty to see if the sealed system is covered longer than one year. Generally, if it is, most manufacturers will replace the unit (rather than repair it, as the repair is rather expensive compared to the cost of a new unit). If you do not have any sealed system warranty coverage left on it, don't fix it. Buy a new dehumidifier.
Are the coils clean? If it has a filter is it clean? If yes to both, it has lost (leaked) refrigerant and it's time to buy a new dehumidifier. If the leak can be found it probably wouldn't be repairable and would cost more to fix than it's worth.
Hate to tell you, but it may be a goner. Many units have a rectangular air filter that may be clogged, but I would still expect to see some moisture removal. Without exact model I'll have to be general,.... remove cover (front or back, depends on model) to see cooling coils. If the compressor is running, these coils should be wet or may have a light frost on them for a time. Not = refrigerant leak. (not economical to repair) If you see one small area of ice,... it's also a goner. If the compressor does not run you could have a bad compressor, a bad defrost control, or a bad control / humidistat. Other than the filter or possibly a fan motor, these unit are rarely economical to repair.