My AC is about 2 years old and the inside fan runs constantly. The outside unit runs fine. The house is cool (as cool as it can for for 100 degree temps outside). What would make it run constantly and how can I fix it. Please help. Between gas prices and price of energy...I'm going to be crazy. Thanks. :(
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the outside unit is where it all happens. That is where the compressor is and its cooling fan. The inside unit is just an evaporator, a bit like a car radiator and a fan. The inside unit is protected by the room, the outside unit is in the rain, snow and wind.
Due to the many different questions I see about Air Conditioning, I am including this overview to help us better understand each other for trouble shooting. A basic air conditioning system has a Thermostat, Air Handler or Furnace Fan and a Condensing unit. In a split system, the condensing unit (Condenser) is separate from the furnace and usually in the back yard. When working properly, it blows hot air. It connects to the cooling part of the system by 2 copper lines. One large line and 1 small line. The part that cools the house is the "Evaporator" and is usually on top of the furnace inside the square metal box (Plenum). When the Air Conditioner is running, the large copper line should be cold and the smaller line should be warm. Common signs of low refrigerant are that both lines are the same temperature and/or frost or ice has built up on the large line at the condenser. The thermostat will normally display room temperature on till it is touched to change the setting. It could have a "Span" setting as well as times and temperatures. The operating "span" of MOST residential thermostats is 40 to 90 degrees. That means you can set it as low as 40 degrees and no higher than 90 degrees. It probably has a fan switch also. When in the "ON" position, the fan will run constantly, 24 / 7, but the condenser will still cycle on and off as needed to keep the house at set point. If you have a suggestion to include in this paragraph, please let me know.
I think I have it covered above. Let me know if you need something more specific. Thank you. Roger
If both fans runs (inside and outside), check if the compresor runs , if does probably the unit is low in freon and needs to be recharged after the freon leak has been fixed (remember this is a seal system and it shouldn't leak), but if the compressor doesn't work , it could be the capacitor , the pressure switch (if it's low on freon ) or the compreessor itself.But befor do anything ,if you have a digital thermostat replce the batteries.
Your AC cooling efficiency is low when he ambient temperature is high and naturally it cools well when the outside temperature drops. Please remove the filter on the grill and try to clean it under the tap water and after removing all the dust fix it back to the unit. This would increase the cooling efficiency of the unit. Your AC is also five years old. Please avoid frequent opening of doors or windows. Ensure that the exhaust fan and the blower of your unit are functioning normal. The technician might not have done a proper job in fixing the area where the refrigerant would have leaked out. Please check the refrigerant pressure to ensure that no further refrigerant leak has taken place. Or even servicing your unit he would have punchered the tubes resulting in very slow leak of refrigerant resulting in no cooling or less cooling. It takes around a month to feel the pinch of it and the refrigerant. One fine morning after sometime the unit will run and it would start throwing hot air instead of cool breeze!
High humidity causes Icing of the cooling coils. Avoid constant running of the a/c. Meaning let the AC pull the house dow 2 - 3 degrees at a time.. The unit shutting off will allow the ice to melt. Make sure the drain is clear by going outside and chkg for drainage. Once the house is reasonably dehumidified the ac can be set and left on its own.
Sounds like your Capacitor is bad, or you had a wire burn off compressor terminal or capacitor. Way you can check capacitor is take cover off and see if looks swollen. Make sure to turn off power before taking panel off.