So, the other day my Air con suddenly was not blowing cold air. When I touched the low pressure pipe from the compressor, it didn't feel cold at all. So I took it to my nearest ac shop and get it topped up with new freon. Now I noticed when I put the temp at 32c, the compressor still engages intermittently. Is this normal behavior? I thought when I put the temp at the hottest, the compressor shouldn't engage at all.