I have this Sharp Plasmacluster Aircond, 2 units. Both of them giving crackling sound that I suspect it's from the plastic parts, expand and contract and it can be very very luod sometimes, till make me wake up frmo sleep! The technicians come and tried to fix, taking off the parts and putting them back and they still make the same noise. THey ordered replacement parts but have never come after 2, 3 months!

So frustrated. Anyone experiences this issue? The noise comes even a few minuets after the air cond is switched off!