Question about Friedrich QuietMaster SS12L10 Air Conditioner

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Compressor makes loud noise when it shuts off

When compressor stops it sounds like it wants to jump out of the unit

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Re: compressor makes loud noise when it shuts off

If you know that the compressor is making the noise, I really believe you need to prepair to replace the the air conditioner. If under warranty it would be wise to contact the dealer for options.

Posted on Oct 21, 2007

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Hi,Whynter Portable Air Conditioner has many moving parts, and they all make noise and cause vibrations. Some of these parts are more likely to causing shaking and loud noises, and sometimes this signals a larger problem, something to watch and scrutinize. If serious enough, it calls for a repair.

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Sometimes air conditioners squeal, hiss, hum or screech. Each noise is often accompanied by a vibration. Humming sounds along with a vibration may indicate a bad capacitor, the electrical part responsible for starting the machine. Hissing sounds tend to indicate a pressure problem while screeching and squealing sounds are fairly common in window air conditioners and in central air conditioners. This sound is also a result of the compressor motor. It usually starts when the unit turns on and continues through its normal operating cycle. Vibrations always occur in the air conditioner due to moving parts and the compressor motor's operation.

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