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Stabilizer or compressor issue

ghoshop

TF Neo
I have a second hand LG split 2 ton AC which I purchased last year.

I am facing lots of issues from AC since last 2 months. Today, stabilizer flickered when compressor turned off on it's own. Before compressor turning off, I hear some buzzing sound from Stabilizer. What does it mean? It also happened several times few weeks back.

I noticed that this happens only in sunny days when it is hotter. During rainy or cloudy days, I don't face such issue. Cooling is also better at higher set temperature when rains or cloudy day happen.

Btw I haven't done servicing since last once year. I do clean air filter panel of AC too every 15 days.
 
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