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Check for badly bent fins or obstructed/dirt impacted fins on the outside of the unit. Could also be low on gas. Try setting the t/stat to various settings see if its turning off/on at higher settings, if it does most likelt stat is OK. Also make sure you drian is clear.
Hello, ice will form for one of two raesons, either low airflow or a low refrigerant charge. Start by checking the filter to make sure it is clean, then check the blower wheel and make sure it is clean. If the unit is clean then the unitnis low on refrigerant and will require a hvac tech to come out and recharge the unit.
If they freeze up and stay that way, you have a refrigerant leak. Time to replace the unit. This is rather common, as the water condenses on a steel part, which will corode. (they don't make them out of stainless steel, so they will be able to sell more at a cheaper price, rather than a few which would last 10 x longer. Unfortunately, they basically all made that way.)
check fins in the condenser coils (the fins on the outside part) for obstructions or alot of bent fins. should be free and clear. but chances are the freon level is low. can be serviced, but may be cheaper to replace.
The number 1 reason for freezing is not enough air flow across the evaporator (inside) coil. Check filter, and try vacuuming the coils. Use care to not mash or bend the fins. If this does not work, then perhaps a wash with a soap solution and water hose will do the trick for you.
That is what removes the heat from the hot gas, if bent or pluged, it will make the system work a lot harder. Just take a knife and straighten them back, or go to a supplyhouse for ac and ask for a coil fin comb to straighten back out fins on a coil!
I am guessing that this is a window mounted unit??
The main reason for an air conditioner freezing over is that it is not getting enough air flow. You should replace your filter, make sure not to fold over any of the soft metal fins, you may also have build up in these fins and that too will restrict air flow and cause the unit to freeze up.
If this is central air, then the same thing is true, start with the filter, but remember that you need to let the system breath. Do not close off to many vents in your home thinking that you are going to save money, in fact this can cause your power bill to increase because the system has to work harder and hotter.
If the unit continues to freeze up, you should have a certifed A/C tech come out and take your air conditioner apart and clean it. If it's a window unit it might be better to just replace it all together.
set your unit to fan mode only, to thaw the ice, after the ice melts, look at your evaporator coil, see if its dirty, if its dirty, then you might just need a good cleaning. if the coil is clean, look at your thermostat setting. it should not be all the way cold. the compressor would run continously and it would freeze the coil. third, the refrigerant system could be partially clogged up or it lacks refrigerant. these problems initiate freezing of the coil.
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