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  1. #1

    =What is short cycling?

    What is short cycling and how do I know if I have it?

  2. #2
    Join Date
    Mar 2010
    Location
    Morgan Hill Ca.
    Posts
    1,219
    Quote Originally Posted by jlandry_indians View Post
    What is short cycling and how do I know if I have it?
    Short cycling is a term used to describe short run times and/or short off times...

    Many times starting and stopping equipment rapidly is detrimental to machine life and not at all energy efficient....

    depending on what we're talking about, 60% duty cycle Should be OK....

    I hate it when a compressor only runs for ten minutes then off for five....

    GT
    If a day goes by and you have learned nothing, I hope you got a lot of sleep.

  3. #3
    Mine will run for about 15-20 and then off for about the same?
    Is that short?

  4. #4
    What causes short cycling?

  5. #5
    Join Date
    Oct 2003
    Location
    Washington
    Posts
    7,405
    Quote Originally Posted by jlandry_indians View Post
    What causes short cycling?

    To put simply, oversized equipment.

  6. #6
    Join Date
    Oct 2005
    Location
    Pacific Northwest
    Posts
    2,267
    Quote Originally Posted by jlandry_indians View Post
    What causes short cycling?
    Far more often it's things other than over sized equipment that causes short cycling.

    If you feel your equipment is cycling too often you should call your service company and have it repaired.

    There are way to many variables to make any snap judgments.

    Make your feelings known to your service technician.

    See what he says and check back.

  7. #7
    Join Date
    Jul 2004
    Location
    Massachusetts
    Posts
    6,837
    From a long distance away, 15-20 minute cycles does not sound like short cycling. It sounds like the system is operating to the temperature set at the t-stat. Some t-stats do allow for a maximum number of cycles per hour but at 3 per hour, you're okay from here. IMO, short cycling for AC or HP is 3-minutes on, immediate start when the delay time expires, 3-minutes on,etc. and the cycle continues. As the outdoor weather heats up, the "on" cycle times should increase and the "off" cycle times should decrease until on the hottest days, it's 100% "on" and zero "off". That's design temperature. If it gets hotter than design, the unit still operates 100% of the time but the indoor temperature begins to go up too.
    If YOU want change, YOU have to first change.

    If you are waiting for the 'other guy' to change first, just remember, you're the 'other guy's' other guy. To continue to expect real change when you keep acting the same way as always, is folly. Won't happen. Real change will only happen when a majority of the people change the way they vote!

  8. #8
    Join Date
    Jan 2010
    Posts
    6,348
    Low pressure switch.

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