Question about Comfort-Aire Dehumidifiers

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Model BDH-651-D about years old. The coils and fins freeze and get frost inihibiting air flow. They are clean and dirt free. Fan is running, but the unit will not work as efficiently as before.

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Need to check freon sounds like it low on charge.

Posted on Sep 04, 2010

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1 Answer

What causes the unit to freeze up?


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.

Sep 12, 2014 | Danby Dehumidifiers

1 Answer

Freezes up


most units draw in the front and expel from the rear air , keeping filters clean (never run without one) is important for this function , frost on coils is a sure sign that air flow is low , or might be unit has lost [part of its gas charge due to heat build up from loss of cooling

May 13, 2014 | Kenmore 54501 Dehumidifier

1 Answer

The dehumidifier freezes up and continues to run so it never melts.


Check the air filter. Freeze ups are often caused by low airflow across the cold coil. A dirty air filter can severely restrict air flow. Replace or wash (if a washable type) the filter and allow the dehumidifier coils to defrost completely. Reinstall the filter and be sure to locate the appliance so that air flow in and out of it is not restricted in any way (not up against a wall, behind a door, curtains, etc.) and restart.

If the unit has been run without an air filter, the cooling coil fins are probably choked with dust and dirt. They should be cleaned with a product designed expressly for this purpose such as:

steve_con_82.jpg

Evaporator coil cleaner is available from many hardware and "big box home supply stores" such as Lowe's or Home Depot.

Use only as directed, and buy filters! it's much easier to replace filters than cleaning coils.

I hope this helps and good luck! Please rate my reply "4 thumbs up" if it was helpful. Thanks!

Aug 15, 2011 | Dehumidifiers

1 Answer

Blowing air out ,not pulling in


It may seem like no air is being pulled in - but air must be going in if air is being blown out. The air coming has to come from somewhere. It is more likely that the air flow is restricted.

This appliance has a reusable, washable filter. It should be checked regularly and cleaned as needed to allow the free flow of air into the appliance. A dirty filter restricts airflow and reduces efficiency of the appliance. It can also cause frost to clog the fins, too. If this happens, shut off and allow to thaw. Clean the filter, shake off excess water and reinstall. Power up the appliance again and it should work as expected. Do not operate the appliance without a filter installed. If you do, the fins will clog with dirt and are much more difficult to clean than a filter.

I hope this helps and good luck. Please rate my reply - thanks.

Apr 24, 2011 | Haier DE65EJ Dehumidifier

1 Answer

Frost


Hi,
Dehumidifiers2_bing.gif freezing up can be causes by a few different problems.
Here is a tip that I wrote to help people with the freezing dehumidifier2_bing.gif problem....

Dehumidifier2_bing.gif is Freezing up and not working
http://www.fixya.com/support/r4662033-dehumidifier_freezing_up_not_working

heatman101

May 17, 2010 | Goldstar DH304 Dehumidifier

1 Answer

Runs great but no water in bucket ,whats wrong


either there's no moisture in the house (especially if you have an air conditioner), the coils are not cold enough, or there's no air flow across the coils. if the latter is the case, clean off the rear coils, clean off the front filter (or if no filter, the fins), and see if the fan is working. cleaning the condenser coil fins in the front would also help with it not getting cold, if that were the problem.

Jul 29, 2009 | Fedders A7DH45B2A Dehumidifier

1 Answer

Dehumidifier runs but does not collect water


you must also clean the fins on the front. remove the plastic case and use compressed air or coil cleaner to clean out the dust and dirt on the condenser coils. if there is not enough air flow, the freon will not cool enough.

Jul 23, 2009 | Edison DHE55 Dehumidifier

1 Answer

Dehumidifier


Most dehumidifiers these days have a built in defrost control, which turns the compressor off when the coils frost up while the fan continues to blow to help melt the frost off, so if it is frosting you may need a new defrost control, but first check the following: If your model has an air filter, clean it, as restriction of air flow will contribute to icing. Try to move the unit to a warmer location. Usually the best way to do this is to get it above the floor as far as possible, as the air temp is warmer closer to the ceiling than it is at the floor. Make sure there is plenty of room for air to circulate. (don't push it against a wall)

Sep 15, 2008 | Danby Dehumidifiers

2 Answers

Fedders Dehumidifier


ALL DEHUMIDIFIERS REQUIRE ROOM TEMPS TO BE AT LEAST 65 DEGREES AND A HUMIDITY OF AT LEAST 50 % TO OPERATE PROPERLY. ANYTHING LESS AND IT MAY FREEZE THE EVAPORATOR COILS. EVAPORATOR COILS WILL ALSO FREEZE IF THE COILS ARE DIRTY AND HAVE RESTRICTED AIR FLOW.TRY TAKING THE COVER OFF OF THE UNIT AND CLEANING BOTH SETS OF COILS INSIDE. THEY ARE COPPER OR ALUMINUM WITH FINS ON THEM.
ALSO CHECK THE FAN TO BE SURE IT IS RUNNING.
THAT WILL CAUSE AN OVERHEATING CONDITION AND WILL SHUT DOWN THE COMPRESSOR ALSO.

Jan 13, 2008 | Dehumidifiers

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