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Thread: Hard Start Kit?

  1. #1
    Join Date
    Oct 2005
    Posts
    26
    What exactly does a hard start kit do and are they normally part of every heat pump system

  2. #2
    Join Date
    Oct 2004
    Posts
    3,400
    Originally posted by gtownguy
    What exactly does a hard start kit do and are they normally part of every heat pump system
    A hard start should have been called an "easy start".

    It ensures that the compressor will start under a load.

    They are always used with reciprocating compressors when the metering device is a thermostatic expansion valve (TEV or TXV, depending on brand name & custom).

    Since a TEV is VERY common on heat pumps, the use of a hard start is required.

    Some scrolls will start without one.

    Your contractor can help you with which models need a hard start.

    They are also used when voltage is borderline low, or if equipment is having trouble starting.

    A hard start is a good thing.


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