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  1. #1
    Join Date
    Mar 2019
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    condenser will not start

    found unit 2.5 ton HP NORDYNE not running. Ahu working but no condenser.
    Have 26.2 volts at R&Y and at C&R. So took defrost board off found lizard behind it.
    Ordered board IMC-302C which i was told replaces Nordyne 917178A.
    replaced board still will not run.

  2. #2
    Join Date
    Jul 2007
    Location
    Virginia
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    11,842
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    Quote Originally Posted by larryjack View Post
    Have 26.2 volts at R&Y and at C&R.
    If the "Y" terminal is energized at the defrost control by the thermostat calling for cooling, would you have 26.2 volts between "R" and "Y"?

    What is the model number of this Nordyne Heat Pump?
    Instead of learning the tricks of the trade, learn the trade.

  3. #3
    Join Date
    Mar 2019
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    Thread Starter
    FT4BE 030

  4. #4
    Join Date
    Mar 2019
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    Thread Starter
    FT4BE

  5. #5
    Join Date
    Jul 2007
    Location
    Virginia
    Posts
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    Quote Originally Posted by larryjack View Post
    FT4BE 030
    Thanks for the model number. Now can you answer my first question?
    Instead of learning the tricks of the trade, learn the trade.

  6. #6
    Join Date
    Mar 2019
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    Thread Starter
    lets forget about that voltage.
    What should have voltage when calling for cool?

  7. #7
    Join Date
    Dec 2002
    Location
    SouthEast NC ICW & Piedmont Foothills
    Posts
    7,926
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    You might want to call a service tech to determine what the malfunction is.
    It`s better to be silent and thought the fool; than speak and remove all doubt.

  8. #8
    Join Date
    Jan 2004
    Location
    PA
    Posts
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    If you measured 26 volts from R to Y. Then you don't have a call to run.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  9. #9
    Join Date
    Jul 2007
    Location
    Virginia
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    Quote Originally Posted by larryjack View Post
    lets forget about that voltage.
    What should have voltage when calling for cool?
    I am not trying to be sarcastic here - honestly.

    Your profile states you are a technician, and a technician should know what the voltage should be between "R" and "Y" when a unit is calling for cooling, and what it should be when it's "NOT" calling for cooling.

    Do you work for a HVAC company, or are you a "One Man Show", or are you really a home owner disguised as a technician?
    Instead of learning the tricks of the trade, learn the trade.

  10. Likes vin lashon liked this post.
  11. #10
    Join Date
    Jan 2010
    Posts
    19,279
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    Quote Originally Posted by rundawg View Post

    Do you work for a HVAC company, or are you a "One Man Show", or are you really a home owner disguised as a technician?

  12. #11
    Join Date
    Mar 2015
    Location
    Medford, N.Y.
    Posts
    6,657
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    Quote Originally Posted by larryjack View Post
    lets forget about that voltage.
    What should have voltage when calling for cool?
    Lets NOT forget about the voltage reading,whether you like it or not. I'll let other be all nice and easy on you,it seems that is not my style. As stated you DO NOT sound like a Tech. If you are a Tech you had better do some basic studying.

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  14. #12
    Join Date
    Aug 2002
    Location
    Southold, NY
    Posts
    27,233
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    Quote Originally Posted by larryjack View Post
    lets forget about that voltage.
    What should have voltage when calling for cool?
    24 Volts.

  15. #13
    Join Date
    Jan 2019
    Location
    Vero Beach, Florida
    Posts
    651
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    If you have voltage between r&y then you’re not calling for cool.

    How long have you been a tech?

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