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Thread: Heat Pump?

  1. #1
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    Default Heat Pump?

    Freddie Mac foreclosure with exterior heat pump, York M # YHJD42S41S7A. Thermostat had settings for only heat and cool. When heat set, a high efficiency furnace provided heat, and on cool setting, the heat pump was operational but did not produce cold air. Wondering if this was a wrong install as this was installed after foreclosure process initiated. Also, can heat pump be wired only cooling?

    Sidney Alstad

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  2. #2
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    Default Re: Heat Pump?

    Sidney, sorry I do not do foreclosures.

    1: Did the serial numbers on the compressor?

    The year on manufacturing is 1979 2000 but the fourth letter, # YHJ(D)42S41S7A
    does not match the literature on Building Intelligence Center.

    Heat Pumps life expectancy is 15 years.

    Hope that helps.

    Robert Young's Montreal Home Inspection Services Inc.
    Call (514) 489-1887 or (514) 441-3732
    Our Motto; Putting information where you need it most, "In your hands.”

  3. #3
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    Default Re: Heat Pump?

    Quote Originally Posted by ROBERT YOUNG View Post
    Sidney, sorry I do not do foreclosures.

    1: Did the serial numbers on the compressor?

    The year on manufacturing is 1979 2000 but the fourth letter, # YHJ(D)42S41S7A
    does not match the literature on Building Intelligence Center.

    Heat Pumps life expectancy is 15 years.

    Hope that helps.
    That is the model #; Serial # W1M5191196

    Sidney Alstad


  4. #4
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    Default Re: Heat Pump?

    Quote Originally Posted by sidney alstad View Post
    Freddie Mac foreclosure with exterior heat pump, York M # YHJD42S41S7A. Thermostat had settings for only heat and cool. When heat set, a high efficiency furnace provided heat, and on cool setting, the heat pump was operational but did not produce cold air. Wondering if this was a wrong install as this was installed after foreclosure process initiated.
    I would write what I observed.

    It was manufactured in Wichita November 2015.

    Quote Originally Posted by sidney alstad View Post
    Also, can heat pump be wired only cooling?

    Sidney Alstad
    I bet in the wrong hands it can do more than that.
    Why you, asking?

    Robert Young's Montreal Home Inspection Services Inc.
    Call (514) 489-1887 or (514) 441-3732
    Our Motto; Putting information where you need it most, "In your hands.”

  5. #5
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    Default Re: Heat Pump?

    I forgot to ask, was the thermostat set to emergency heat?

    Robert Young's Montreal Home Inspection Services Inc.
    Call (514) 489-1887 or (514) 441-3732
    Our Motto; Putting information where you need it most, "In your hands.”

  6. #6
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    Default Re: Heat Pump?

    Quote Originally Posted by sidney alstad View Post
    Also, can heat pump be wired only cooling?
    Sidney,

    A heat pump is, basically, just an air conditioning system wit a reversing valve which reverses the direction of refrigerant flow: a) cooling uses the indoor coil as the evaporator coil and the outdoor coil as the condenser coil - this transfer heat from inside to outside; b) heating uses the indoor coil as the evaporator coil and the outdoor coil as the condenser coil - this transfers heat from outside to inside.

    If the unit was wired incorrectly, the thermostat wired incorrect, an incorrect thermostat installed, etc, a heat pump could be wired to 'only heat' or 'only cool'.

    Heat pumps typically also have a back up heat strip, thus the thermostat will have an emergency heat setting which allows just the heat strip to operate.

    I may be possible to wire it so the emergency heat strip turns on when in cooling mode - which could produce nothing positive (no heating and no cooling).

    Jerry Peck
    Construction/Litigation/Code Consultant - Retired
    www.AskCodeMan.com

  7. #7
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    Default Re: Heat Pump?

    Quote Originally Posted by ROBERT YOUNG View Post
    I forgot to ask, was the thermostat set to emergency heat?
    As stated in the original post, there was no emergency heat setting on the thermostat.


  8. #8
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    Default Re: Heat Pump?

    Quote Originally Posted by sidney alstad View Post
    As stated in the original post, there was no emergency heat setting on the thermostat.
    I can read what you said but did not see what was there.
    Also, I am not here to get it in the neck.
    So where did you indicate there was no EM HEAT?

    Please read Jerry's answer.

    Hope that helps.
    Have a great day.

    Gees Louse.

    Robert Young's Montreal Home Inspection Services Inc.
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  9. #9
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    Default Re: Heat Pump?

    Quote Originally Posted by Jerry Peck View Post
    Sidney,

    A heat pump is, basically, just an air conditioning system wit a reversing valve which reverses the direction of refrigerant flow: .
    If you only knew how many strange looks I get when I say that.

    Robert Young's Montreal Home Inspection Services Inc.
    Call (514) 489-1887 or (514) 441-3732
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  10. #10
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    Default Re: Heat Pump?

    High efficiency heat, I am thinking gas heat. While there are dual fuel heat pumps, they will still have Emergency Heat setting on thermostat.
    This could be just a gas pak standard HVAC unit. Heat and Cool on thermostat.
    The fact that is wasn't getting cold air is another matter. Did compressor kick in?


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