Does not seem to cooling very well

The way to reset these units is to turn off at the breaker for at least 2 hours and preferably overnight. It does have an internal PCB reset button that is mentioned in the Service Manual. It is a VERY complicated system!

https://www.google.com/search?q=LG+MINI+SPLIT+LMU540HV+reset

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doesnt sound right but are you certain you arent trying to dehumidify the bedroom? that would slow the fan down

Some portable ACs will suck in warm air from outside, making it hard to cool the room. The only fix is toget a machine with a balanced pair of ducts.

Do you hear compresser start up noise. If so then please check it with a clamp meter and Amperage the Unit is drwing. If it is less than 8-9 Amps than there is some leakage in the AC and all the collent has leaked. So you got to get it serviced.

I never heard of something like that before.

Hi,

Here is a tip about troubleshooting your air conditioner...
There are many things that can cause your air conditioner not to cool...

AirConditioner Trouble - Review the Possibilities

heatman101

Hi,

Here is a tip about troubleshooting your air conditioner...
There are many things that can cause your air conditioner not to cool…

Air Conditioner Trouble - Review the Possibilities

heatman101

The motors in a garage door opener are under quite a strain and will not run too much without overheating. The thermal overload will cut them off until they cool. This could be your problem. The model number of the opener is on the end of the motor unit nearest the door and you need that to make sure you have the right keypad. There are more than one and some will not work.

For every 500 sq. ft. house or a 1-bedroom size new house you need 1-ton of cool . An old house you need a ton worth of cooling for every 400 sq. ft. house or a 1-ton per 1 bedroom size house.

I would consider replacing the t'stat if it does not seem to cycle at the desired temps. Also, the outside air allows fresh air to be introduced into the conditioned space but it will also effect, to a degree, the units ability to cool the conditioned space. Once you get the unit running, try it with the baffle on and closed and see which one you like. Remember, the outside air has and add humidity and can make it seem hotter than it really is in the room.