Yeah same problem here it is most likely out of freon and lost its refrigerant charge, I have purchased a few of these to put in our offices and they all stopped working after 1 year (2 months after the warranty) :) how they make their money in repairs i guess. However, I am searching for a local fix and once i get mine fixed ill return post to all of you what needs to be done.
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These is because you have not service your air-con for a long time. The cooling fins are clotted with dirt & dusts accumulated for a long period of time, and the water vapour caught between the cooling fins turn into ice when you set lower the temperture for the air-con. Moreover cool air from the blower/fan cannot pass thru', the cooling fins to regulate the cool air into your room.
You have to get the professionals to do a service on your air-con.
Your AC needs a good overhauling as the fan seems struck on the bearings or the blades are rubbing the sides. Also the compressor fails to cool as there can be low gas, low pumping pressure or a blocked condenser.
You need to remove clean the coils and lubricate the fan to be set back. Check the capacitor to the fan and compressor as a low value will reduce the speed and so reduce pumping pressure.
insufficient cooling have several reason,most common factor is low freon charging due to service factor,defective thermostat control,dirty evaporator and condenser fin,try to check the current rating using ammeter clamp tester if the rated current read in tester below the rated current on tag(compressor)
you need to charge freon,if the fin and evaporator is dirty need to ve clean,if the thermostat is not functioning replace thermostat.
also consider the main defective if the aircon is running chck the compressor if it is running by touching the tip of screw driver to the top body of compressor you can feeel vibration,if compressor is not running yo don't have cooling effect only blowing of air.on repairing this this should be done by a certified aircon technician,have a nice day fix my rate,thank you very much.
You should also check the outside unit to make sure the coil is not clogged with dirt or grass clippings and the fan is working. The reversing valve that switches it from cool to heat could also be a problem. If it isn't shifting it will not switch between heat and cool.
Your compressor ismounted or rubber feet. If one or more of these rubber spacers is gone or loose you need to come up with some more. If these are still n place its possible that the compressor (which is mounted inside the black oval or round case) may have a broken spring. In this case its compressor time Im assuming your fan is ok as you say its only when the cooling is on. Only 4 things move on the AC 1= inside fan 2= outside fan 3= fan motor and 4=compressor& compressor moptor which are in 1 case.
If you need to know more add on more information but I believe if youve gave me all you can thhin of its something to do with the compressor.
OH yes FYI if the outer case of the compressor is round you have a rotary compressor and they arenatorious for being loud and viberating even when new. If you decide its inside the compressor Id suggest replace the whole thing cause the compressor viberation causes tyhe copper lines to become hard and can crack eaisly.
Hope this helps. PLEASE Grade me ACCORDINGLY and good luck.
Are you saying that you have plugged the aircon into an extension lead then into a socket in the wall and that the smoke was coming from the extension lead part. If so I would suggest checking all your plug in connections and chenge the extension lead. A quick way to check the compressor is a cause is to put the aircon to fan only and see if it fails to trip out the circuit breaker, then put it back onto cooling and see if it trips (if it does on cooling then its a good possibility). Most aircons have a three to five minute time delay for starting the compressor to protect against power fluctuations (ie power cuts). Hope this s of some help.