If you hear a pinging or popping sound coming from metal ductwork, this may be caused by thermal expansion or by air blowing past a loose flap of metal. You may notice that it gets noisier and needs repairs more often. The inside unit will…

The following are instructions from the manufacturer:. The task described is not specific enough. Along with the compressor, the condenser coil is the most expensive component of an air conditioner or heat pump. If you have too small of a …