Tip & How-To about Heating & Cooling

Too cool or over cool in room

Indoor sensor to sense the room temp and must cut off the compressor by working. If sensor defective, compressor will continuously running resulting to over cool in room. And also 23 C degree setting temp is best cooling for office and bed rooms. If for peculiar instrument which should be kept under low temp, can be set as mentioned temp (say 18 C or 16 C )

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1 Answer

Portable A/C: Compressor runs intermittently and doesn't cool room


Your issue sounds like either a bad "pressure switch" or that the unit is low on "Freon." Either of these problems will cause the compressor to start and run shortly then compressor cuts off, then and repeats itself.

From your description It really does Not seem to be a "bad board in that unit" because the compressor is starting up, even though the compressor is not staying on long enough to cool said area.

Aug 15, 2016 | Heating & Cooling

1 Answer

the compressor runs for 5 minutes and turns off for 3 minutes. Is this normal?


This seems to be normal from the info you have given. If this is a window unit, it should have a sensing lead at the indoor coil (lead as in a sensor that may be a wire with a part of the very end of it stuck to the front of the indoor coil OR a wire or copper tube that is clipped to the front of the coil). This lead senses the indoor coil temp and when its "satisfied" it will stop the compressor and the indoor fan continues to blow air which heats the sensor and a few minutes later the cycle begins again. I have had to pull the sensor away from the coil a bit for it to cool a room.

May 29, 2015 | Keystone KSTAW05A 5,000 Cooling Capacity...

1 Answer

lg split indoor fan runs non stop


Hello Hamid,
The unit is designed to run the indoor fanmotors continuously when in cooling mode on both indoor units (evaporators). The reason is that this circulates the air and the temperature thermistor or sensor is able to sense return air temperature and in turn start or stop the outdoor unit and compressor as required according to the setpoint temperature. The reason for either unit not reaching setpoint temperature can be a couple of reasons. A) Incorrect design - the unit may be too small for the application. You can calculate this roughly at 650BTU per square meter of room in a relatively warm ambient climate. Or secondly B) The outdoor unit has leaked and is short of refrigerant. You can check this when the outdoor unit is running by feeling the thicker copper tube on the right hand side of the unit. This should be cool to cold. If no temperature difference is felt, it is short of refrigerant. Hope this helps you. Goodbye

Aug 11, 2008 | LG LS-L1210CL Mini Split Air Conditioner

1 Answer

Samsung window unit air conditioner model # AW2402M freezes up one time, and the next time freezes you out of the room. What is wrong with it, Termistat or compressor?


Try to set the thermostat to higher temperature and monitor if the compressor will turn " off " when the room temp. is cool, and turn " on " when the room temp. is high. If does not work then your thermostat is defective. Continue running of compressor with very cold room temp. can build up ice in the unit. The compressora73b784.jpg should shutdown when setting temp. will attain.

Apr 08, 2008 | Heating & Cooling

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