with light switch off, checked continuity between the line and common plug (it had continuity).with light switch off, checked continuity between the line and common plug (it had continuity).
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Possibly a faulty run capacitor in the control box. This is fairly common to LG. the fan motor and compressor use them to start and run more efficiently and when they fail the fan or compressor either don't start at all or run poorly. You can usually tell if you can hear the compressor 'hum' briefly then stop every 10 - 30 secs. this is the compressor trying to start but unable due to the faulty part. LG often have a dual capacitor (two capacitors in one case) so the fan may stop working also or at least run slower. They are common parts available at most electrical wholesalers although the genuine LG parts are normally dirt cheap. Need a model to check the circuit diagram to be more certain.
Hi, If the fan is running and the compressor is not running then you should be getting power to the compressor... Often the dual capacitor will go bad and then the compressor will not start. I usually change the cap to make sure that is not the problem. If the compressor still does not start then check the start amps and you will find that you are probably getting locked rotor amps. or no amps... (open windings) Either way you will have to replace the compressor...
Honestly, if the unit is over 10 years old, buy new to pay for itself in energy savings. Usually the thermostat is the first problem. Thw second is the compressor. The compressor usually takes months to show signs of weakness, but the thermostat is more sensitive, and will go belly up first.
Hello,
Unfortunately the compressor likely is seized now. There are a couple of reasons that the original start device failed, 1) faulty connection. 2) poor quality part. 3) compressor was running non-stop due to other deficiencies in the unit or 4) the compressor was failing to begin with.
The compressor may indeed check out ok as far as electrically ( windings ) but the mechanical component ( rotor ) has locked/seized up. You can determine whether it is the windings by checking the ohm value between common to start, common to run and run to start ( c-s, c-r, r-s ) and look for values similar to 6ohms, 3ohms, & 9ohms. Then check the start and run & common windings against the compressor casing to see if windings are shorted. In order to double check the mechanical component you'd need another hard start, ( or a test cord direct to 120vac, but that should only be done by an experienced tech ). nothing else will start it at this point obviously or you wouldn't be using a hard start already.
The other unfortunate issue is this, many of these compressor's have a 10yr. parts only warranty but that was voided as soon as the 3in1 hard start was installed.
In the end I'm likely not telling you anything you didn't already suspect or know in fact, but it is likely the compressor. I sympathsize, seized compressors **** !
Hope this answers your question and moves you forward.
good luck
macmarkus :)
It is possible the capacitor has gone bad, cause, possibly a power surge. Suggest replacing capacitor first and see if problem happens again then I would change fan motor and capacitor. Good luck on your repairs
with light switch off, checked continuity between the line and common plug (it had continuity).
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