My 9 year old 17,500 BTU wall mounted window Unit is freezing over with little air coming out. New filter & clean coils still have same problem.

Not really, regular cleaning of the filter is needed to prevent freezing of the indoor coil causing damadge to the compressor

My guess is that you have a dirty outdoor coil.

Good job, on cleaning the air intake filter. Some folks overlook that. Since that helped some, I believe you need to clean a little further. Like the cooling coils and the cooling fins for the compressor. But, before attempting any cleaning turn the Master ON/OFF Switch to OFF and unplug the unit from the wall outlet.

You can clean the coils with warm water and liquid dish washing liquid,. Rinse and dry thoroughly. When dry, apply a light coating of WD40.

The fins can be cleaned using an old toothbrush and a vacuum cleaner that has a hose and brush attachment or crevice tool.

Completing this Annual Type Maintenance should provide significant results.

could be several things...if all is working/blowing and its clean inside & outside with a clean filter then more then likely it's low on gas/freon......if you continoue to run it it'll pobly ice up/freeze......also make sure you hear the compressor running as well as the fan blowing. sometimes this can be tough listen for that deep rumble/humming sound thats the compressor.

It is not enough btu`s most likely,but you can dissasemble the unit and clean it,and the coils.

When a AC freezes up the most likely reason is that the evaporator coil (the one the cold air comes from) is 'dirty,' and/or the filter (that goes in front of the coil) is also 'dirty.'

Be sure to defrost the unit (if it isn't already).

If it presently has ice on it - just turn the unit to FAN ONLY and allow it to completely defrost (all ice gone).

Then: Be sure the filter is 'clean' and air can flow through it.

Be sure the coil is also clean.
Note: if the coil is dirty you can usually clean it fairly easy with a brush. Often (especially if the unit is freezing up) you can actually 'peel' a layer of 'wet matted stuff' from the coil by hand.

Another reason (less likely one) for the unit freezing up - is that the fan motor is going off (when it shouldn't) and the "lack of any air" over the coil is causing the unit to freeze up. You didn't say anything about the fan motor not running so it's not likely this is your problem - but be aware - that fan motors can get hot and will go off on internal overload - UNTIL - it cools down and then will come back on - so - if you're not watching - it's possible the motor could be "heating up and going off (for 30-90 minutes) and coming back on" without you realizing it, which would cause the unit to freeze up. Like I said - this is not likely though. If, however, it is doing something like this - the 'sure-cure' is to replace the motor. The cost to replace a blower motor will be somewhere in the neighborhood of $200 which should cause one to think about buying a new unit.

Another reason - also 'less likely,' is that the AC is 'low on refrigerant.'

If - after checking the filter/coil - you find that they are both clean and not causing the problem - and you've watched the fan motor and it's not going 'off and on,' then, you must consider that the unit is 'low on refrigerant,' which will require a Service Tech - who has the expertise and tools to repair the leak and re-charge it. If this is the problem you're probably looking at a repair bill of $75 -$125 - which when considering the price of 'new air conditioners' might cause you to think about buying a new one.

Hope this helps.

Possibly dirty evaporator coil or condenser coil. Maybe dirty filters. Also could be low on refrigerant charge.

First check your coil behind the filter. If this coil iss clogged the unit will over heat and cause the compressor to shut down. It sounds as if either the evaporator coil (inside) or the condensor coil (outside) may be clogged. If the unit is icing up on the inner coil then that coil is clogged or low on freon. I would think it would be cloggged instead of freon problem. To clean this coil you can go to the hardware store and buy a can of coil cleaner and use it following the directions The outer coil you would have to remove a/c from sleeve and take the unit outside. Using a water house flush the condensor coil from the outside in to remove debris.. These coils should look like a brand new car radiator when you finished cleaning. Reinsert the a/c back into wall sleeve after letting the water evaporate from the unit as to not spill water through out the area. Good Luck

Dave

chances are you may need a bit of freon might have small leak on the flares

have you brought it down for a general cleaning on the 3 year period? if not then that's what it needs now.

the coil is freezing up because of dirt accumulation on the coil. even there is a filter, still with in 3 years it could have accumulated to decrease the airflow thru the coil and freeze it up.

tnx 4 using fixya,

drcool