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Does a refrigerator compressor have reed valves?

Discussion in 'Electronic Repair' started by nucleus, Nov 24, 2007.

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  1. nucleus

    nucleus Guest

    Does a refrigerator compressor have reed valves?
    is there a a check valve in the freon line?

    10 year old kenmore top freezer refrigerator began
    making annoying noise from compressor about a month
    ago. cooling properly, exterior compressor mounts
    are fine. coils clean, defrost timer working properly,
    defrost cycle working properly.

    the noise sounds like a valve-type internal clatter,
    am not sure of compressor RPM but extimate the noise
    is several hundred cycles per minute. when compressor
    starts, the noise is not there but after a couple
    of minutes (maybe after the freon pressure builds),
    the noise is annoyingly loud.

    so the question: is this a valve problem? i've never
    had this happen on any other refrigerator we've ever
  2. Meat Plow

    Meat Plow Guest

    Most light duty compressors are reed valve equipped. Often the compressor
    is loud when there is a lack of head pressure as is when the compressor
    first starts then over a period of a minute the noise diminishes. This is
    normal. In your case the reeds make noise once the head pressure builds
    and is abnormal. How long will it last? Good question. It could operate
    this way for months, maybe years. Or it could fail tomorrow.
  3. James Sweet

    James Sweet Guest

    They do, and the valves are about the only part of them that ever fails so
    long as the refrigerant charge isn't lost. The other thing that can happen
    which gets noisy is if one or more of the springs breaks. If you open up a
    hermetic compressor, the mechanical assembly floats on some springs in a
    pool of oil, if a spring breaks, moving parts can clatter on the inside of
    the dome.
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