My 18,000 BTU LG window AC: The compressor wont shut off.

something else besides the ac is stopping ( overloading) the genset
if it works well during the day, the compressor has to be working so the ac is not the problem
a 4000 watt gen set has a duty cycle load of around 3000 watts full time so any additional power requirement besides the ac will overload it
electric stoves , microwave ovens , hot water elements , anything that consumes power after dark will when combined with the ac will overload and shut down the gen-set

call fujitsu engineering division direct and ask them about what is connected and if it works ok
logically as each evaporator has it's own tx valve as long as the compressor is large enough to run all together it should work but get the right information from the fujitsu experts

sounds to me like you have to change your " room and coil " sensors..they are thermistors that work together to communicate with the pcb and tell the compressor when to turn off. if you can use a multimeter, check the ohmic value(s) they supposed to be between 4k - 10k. with the meter attached warm the thermistors by rubbing them between your fingers and the ohmic values should change.the room sensor can be found on the evaporator coil when you remove the face cover you will see it, the coil sensor will be found on either right or left side of the evaporator inside a piece of tubing. sometimes there is only a room sensor...hope this helps

If the air conditioner compressor runs all the time the main control board might be defective. The main control board provides the voltage to the fan motor and compressor. These boards are often misdiagnosed. Check all other components to be certain this is the cause of the problem.

It may simply need to be recharged with refrigerant gas. R134a is the standard refrigerant gas now. But, it's best left to the pros.

Hope this helps and thanks for choosing FixYa.

Hi, This being 18,000 BTU is a 240 volt unit. The electronic in it work at 120 volts. I believe you have only 1/2 the electrical current going to it. Thus the Hum. CHECK YOUR FUSES OR CIRCUIT BREAKER!
A 240 volt circuit breaker has two sides or switches with a bridge between them. One of them may be tripped. Shut off the breaker wait a few seconds then turn it on so that the it engages all the way. It if clicks or pushes your fingers back and prevents you from engaging it, there is a problem likely with the compressor/fan or it's wiring, and it is drawing too much current and requires repair or replacement.

Hope this helps,
Best, Mark

The 18,000 btu A/C is 230 volts, are you sure the 12,000 btu unit is 230 volts most are 120 volts.
Usually 12,000 btu is the biggest 120 volt A/C you can buy.

sounds like your switch is bad still allows power to compressor when it shuts down the blower,,.....

I just bought the LG 10000 btu window model... I am having the same exact problem.. it feels like the air is not even on.. I am having someone look at it on Mon. I have a feeling the whole unit is defective. But it could be the thermostat needs to be replaced. Sucks 300 dollar brand new AC and it doesnt work!! Good luck. I will never buy LG again.

HI , LISTEN MY AIR CONDITIONER DOES NOT START. CORD,THE POWER-TEMP CARD OR WHAT ELSE IT HAPPENED IN A LIGHT OUTIGE. THANKYOU. IT A KENMORE 18,000