said by Mhenry843 :Got a LG 12,000 BTU it's about 2 years old but was only used for a few months up until now. The problem is the compressor kicks on but the air is exactly the same temperature as when the compressor is off it gets no colder at all. I cleaned all the dust out of it haven't cleaned the coils yet because they don't seem dirty at all. I'm no expert in this area so if someone can point me in any direction that may lead me to the problem, that would be great. it sure sounds like the AC was dropped, and leaked out all the Freon, or it may have gotten bumped.. if the compressor is running, and the evaporator(the coil under the filter in the front) is not getting cold, then the Freon is gone..It never fails that this time of year our phones ring about Air Conditioners not being able to cool the house down enough.  We have put together some quick trouble shooting items to help our customers and future customers. As with any trouble shooting we also suggest that if you are uncomfortable with performing any of the suggestions we have, do not hesitate to contact us.  

Safety has to be the most important part in troubleshooting.  Some things are best left for the professional. This is pretty straight forward and not to overshadow the computer repair technician’s response….”Is it plugged in?”.  The thermostat controls the operation of the AC and Furnace and if the batteries are weak or dead there is little or no control of those units.  When on weak batteries, the thermostat can get confused between heating and cooling cycles.  If the batteries are new and everything seems functional, just take notice where it is located in the house.  If you happen to notice it is colder next to the thermostat than it is in the rest of the house, it is not giving you a true measure of the whole homes temperature.  You may need to move it or adjust the valves or dampers to allow the rest of the house to cool off first.  The valves and dampers are located in the basement  and look like the adjacent picture.  Just remember that living rooms with large windows will always heat up faster than a long dark hallway.

We mention this in our spring and fall newsletters every year and have written about it in several blog posts, but homeowners still forget there is a filter on the furnace.  2 ton air conditioner cooling capacityIf your furnace has trouble passing air through a plugged filter, it definitely will have trouble passing frigid air through a plugged filter.  list best ac unitsNot only is the filter there to filter out allergens but it also protects the inner workings of the furnace from dirt and grime.  best central ac warrantyAs my father always told me…………”When in Doubt, Swap it out!” Not to overshadow the auto repair shop…..”But did you check the fuses”.  Believe it or not, the AC unit can trip a fuse without you knowing it.  

The AC Unit and Furnace are likely on different breakers.  When the breaker is tripped it moves over slightly and should show an orange line, but depending on the angle that you are looking into the breaker box you may not even notice something is out of place.  There might also be breakers located on the exterior where the AC unit connects to the wall.  Double check to make sure they are not tripped also.  If tripping of the breakers is a common occurence, we would suggest calling our service department. Check the exterior condenser for any debris or branches lodged into the unit.  The AC fan unit needs to operate and the coils need to be free from debris to operate correctly.  But before you go sticking your hands into the unit, shut off the power at the breaker box and exterior connection or both.  The unit may turn on un-expectantly and fan blades and fingers do not mix. If after all this trouble shooting, your house hasn’t returned to the Antarctic climate that you are used to, it may be time for you to give us a call.  

Keep in mind the average life expectancy of an AC unit is 15 to 20 years, and if you are near that age, you may need to call us for a replacement estimate at (608) 849-5410.  We offer supplemental cooling products in way of mini splits.  Check out our Cooling Pages for more information. 1,596 posts, read 4,599,297 times "Could a hot attic contribute to my unit not cooling even though the exchange is in the garage and the ductwork being under the house and not in the attic? " Originally Posted by citydwellerKeep in mind that the largest surface area in the air conditioned space of your house for heat exchange is the ceiling. If the attic isn't well insulated your A/C has to do quite a bit of work to keep the house cool. Also, my house (an older remodel like yours) had aluminum single pane windows when I bought it. Apparently this is exactly wrong if you want cold air in the house. Originally Posted by BigJon3475 One of the guys who peered under the house commented on the lack of air blowing at him from under the house.

Hopefully, though not necessarily, it means there are few if any leaks in the ductwork. Explain your house...# windows and type, sq ft, ceiling heights, Size in tonnage of the a/c system, number of people, set temps. 1296 sq feet ranch with new low e double pane windows, 8 foot ceilings and 2.5 AC I believe. I usually set it cool at 73/74 during the day when I am here. Yes if you have duct leakage in the crawlspace and it is not sealed off then you can be pushing air out of the home and pulling in hot air from outside or in the attic. You would be pressurizing the crawl space helping out slightly with what little air makes it back into the home from the pressure difference. The home would be in a lower pressure than the crawl space and most likely the attic so it would draw in air from the path of least resistance. There is no hot air coming in from the vents and actually it feels cold. One of the guys said ambient air temp coming out was correct. P.S. also your location.