Hey all, I have an airconditioner here at work in my office. it works Ok but the bottom of the condensing coil keeps freezing up. The unit is at a slight angle to help get the water out that back but if i put it below 70 it starts iceing up again. It is pretty warm and humid out. Any thoughts on what i can do here?
"..if it were short of refrigerant, only part of the evaporator coil would frost.
If it is frosting totally, either the air temperature (inside or outside) is too cold or it is an air flow problem. Maybe the motor is not turning fast enough, the fan is slipping on the motor's shaft, the filter is completely plugged or one of the air flow problems mentioned above.
I have heard that on a perfectly functioning window air conditioner that was frosting completely even in high ambient temperatures, it was speculated that the condensation which was forming on the evaporator coil (which is normal) was causing an air flow problem itself. Some newer more energy efficient models have a very dense evaporator coil which could possibly get restricted by moisture on very humid days. Turning the A/C thermostat down might help the unit to cycle a bit more often to allow the excess moisture to drain away before causing such an air restriction. "
Yea just part of the coil is iceing up. Only about 1" up from the bottom. If i leave it around 70-72 it seems fine but the air that is blowing is not cold. If i turn it down to say 66-68 it starts iceing up in just a few mins. Is it possible for me to add freon without taking it somewhere??
Not unless you have the right hoses and gauges and you know what the readings should be. Many states now require special equipment to catch any freon that may leak out during the recharging process. Freon is a green house gas.
You need a special license to purchase and handle the type of freon that is used in home AC systems, unlike cars where you can simply buy a recharge kit for $35.
Before recharging the leak needs to be fixed or you could find that you're right back where you started in a week.
I poked around online but couldn't find anyplace that listed a price schedule for a rebuild and/or recharge but I suspect that by the time you are done you'd be better off just replacing the unit with a new one.
I think it was mentioned above, but if it's extremely humid and the unit is undersized, the evaporator coil can freeze if the unit isn't cycling properly. Make sure the temperature setpoint is such that it can cycle.
July 28th, 2006, 04:02 PM
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