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Re: air conditioner freezing up
Your unit is low on freon. Take the unit to a service facility & have it recharged & the leak repaired. Note that ice formation may normal if the outside temperature is below 45-50F. If you must use it in the meantime, leaving the unit on fan only will melt the ice much faster.
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Freezing up is caused by
•dirty air filter or evaporator coil(indoor coil)
•dirty blower wheel or blower fan blades
•weak or slow blower motor
If air filter and indoor coil are clean may be low on freon. Blower wheels seldom get dirty on window units. Pull unit from window and clean both coils with a water hose. Careful not to get any electrical wet. Let dry for a while and reinstall. If it continues to freeze its a freon problem most the time.
Clean indoor filter , and coils in unit (you must remove from window and remove top from unit to expose coil, After cleaning coils prop up unit so it slopes to rear and spray back and forth at bottom of front coil until drain is clear . Never turn unit upside down , and do not get water inside of fan motor . Also clean evaporator blower wheel . With unit clean and drained out place in direct sunlight for at least 2 hours to completely dry before replacing top and reinstalling in window , or just drain out , reinstall and leave unit unplugged for at least 24 hours to dry before testing . If unit is clean and still icing , check to see if thermostat works (place object in front of unit to direct cold air from top of unit onto thermostat temperature sensor and compressor should cycle off, if not replace thermostat . If unit still ices you will need a pro to repair sealed system of unit or simply buy a new one .
Have you checked up in filter area at ceiling to see if fins are frozen or frosted bad? If they are dirty, they can cause frost/ice and AC goes in to fan only until frost/ice is gone. When did unit actually get a good cleaning last? Too many registers closed or blocked can cause freeze up as well. Does this unit have ducted or non-ducted system?
If you haven't already, tunr the unit OFF & unplug it. Allow to totally thaw. Then remove the air intake filter and clean it thoroughly. It is probably clogged, which is what caused the unit to freeze up. But, do not attempt this, until the unit has totally thawed.
A line or coil freezing is a sign of restricted air flow or low on freon. Make sure the fan that circulates the cold air is working and the filter and coil at the filter are clean. A dirty coil can be cleaned with coil cleaner and a water hose. You will need to remove the unit and take it outside. (window units only) You can buy a bottle of coil cleaner at any hardware store. Follow the instructions on the bottle but basically you spray the coil until soaked wait 5 minutes and flush it clean with water from a hose. Repeat if necessary. Try not to get water and cleaner on the controls. Be careful water will be trapped in the unit you may want to tip it toword the back for 10 minutes or so and if possible let it set outside to dry. Reinstall the unit and put a clean filter on it and give it a try. If ice forms again it is low on freon and will require a repairman to fix it. Freon is a restricted item and you have to have a license to buy it. good luck..
Hi, when the unit freezes up, it is either low on freon, a plugged a/c filter, or the evaporator coil is dirty and will need to be cleaned. When the evap. coil freezes up, the blower motor can't blow air through the coil. Check the filter, and behind the filter to see if the coil is dirty, just remove the screws to excess the evap. coil on this unit. Make sure the blower motor is running up to speed also. You will know. If the coil is dirty, try and clean it the best you can and replace the filter. If it continues to ice, you will need to have the freon level checked> These are the # 1 causes of coils icing up. Please let me know how it turns out. Sincerely, Shastalaker7 A/C, Heating, & Refrigeration, Contractor
mcdevito75 here, Possibly, the filter needs cleaning / replacement, unit set to too cold. Shut A/C off, let the ice melt on it"s own DO NOT REMOVE ICE YOURSELF, those coils have the fren gas in them, when the ice is all melted restart unit, set temp. not so cold, around 60--65 degrees, and have exhaust to out. This shpoul;d help, you can always check with your local A/C repair shop, they come to the house.
If the AC unit doesn't have sufficient air flow to carry away the cold air then condensation and the extra cold air will freeze at the unit. good air flow is the solution. Change the filters, clean the unit by removing the covers and looking for pet hair/leaves/dirt inside the coils of the unit. and make sure the ducting is connected and not clogged.