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  1. #40
    Join Date
    Jun 2012
    Location
    Pittsburgh PA
    Posts
    57
    Thanks everyone for all the help I really appreciate it , IM going to make sure the coil/txv is really a match on monday. Id feel better if it was there fault instead of mine..
    If anyone knows my coil is #end4x36t172 Arcoaire
    condenser is #n4a330akc200 Arcoaire
    I relize the coil is a 3 ton and condenser is 2.5 ton but they said it would work when i bought it and the older ones i know it removed humidity better that way

  2. #41
    Join Date
    Jan 2012
    Location
    WEST COLUMBIA S.C.
    Posts
    278
    with no superheat means evaporator is flooding.Therefore txv may be stuck open?

  3. #42
    Join Date
    Jun 2012
    Location
    Pittsburgh PA
    Posts
    57
    Anything that would cause that ? Another guy just told me he knows of 10 others D.O.A on. new install bad txv

  4. #43
    Join Date
    Jan 2012
    Location
    WEST COLUMBIA S.C.
    Posts
    278
    Probly what u already posted ;soldering more likely

  5. #44
    Join Date
    Apr 2009
    Location
    Pan Handle, Fl
    Posts
    599
    Quote Originally Posted by hewitt View Post
    with no superheat means evaporator is flooding.Therefore txv may be stuck open?
    That's what I'm thinking also. With temps that low your suction shouldn't be that high. Some time you just get a bad part from the factory. Grab another coil from distributor and change it out.
    Insanity: Doing the same thing over and over again expecting a different outcome!

  6. #45
    Join Date
    Sep 2007
    Location
    NH
    Posts
    1,147
    Is the TEV adjustable??? Just turn it in a little, if it is and see what happens.

  7. #46
    Join Date
    Jan 2012
    Location
    WEST COLUMBIA S.C.
    Posts
    278
    Some responses are saying overcharge?Overcharge on a txv would havehigh subcooland low super heat

  8. #47
    Join Date
    Apr 2012
    Location
    Paper Street Soap Company
    Posts
    2,304
    Quote Originally Posted by Brad gall View Post
    Everything is all new and the same brand.
    I never trust the counter guy either i hope all the equipment is correct
    Ill find out Monday. Im just not sure any other reasons i wouldnt have any superheat at all?
    Also i thought if the bulb gets overheated it would close shut?
    Im not to sure, Ive been in the field a while and havent experienced this problem ?? Thanks alot for your help and any other thoughts would be greatly appreicated thanks
    Overheating it to the point of releasing the charge would close it off.

    I doubt you overheated it.

  9. #48
    Join Date
    Jun 2012
    Location
    Pittsburgh PA
    Posts
    57
    Thanks again for everyones help I will find out today and let everyone know

  10. #49
    Join Date
    Dec 2008
    Location
    caribbean
    Posts
    76
    OT 50F , suction is a way high, remove the sensing buld and warm it up, with ur hand that should start to close the TXV, IF it does not, valve need to be repraced or the head.

    Also due the the low OT , the system might be overcharged, some extra refrigerant was added to compensate the low pressure caused by the low temp, double check air flowm 21F split temp, is a little in the high too.

  11. #50
    Join Date
    Jun 2012
    Location
    Pittsburgh PA
    Posts
    57
    Thanks for the input. Wouldnt i still have superheat regardless if its over or undercharged unless the txv is bad? also the subcooling was normal.
    (non adjustable txv)

  12. #51
    Join Date
    Dec 2008
    Location
    caribbean
    Posts
    76
    Quote Originally Posted by Brad gall View Post
    Thanks for the input. Wouldnt i still have superheat regardless if its over or undercharged unless the txv is bad? also the subcooling was normal.
    (non adjustable txv)
    To test the TXV actally place the sensing buld in a cup with ice then warn it up just to determinate if the valve is responding, if the valve is stuck wide open like you are suspecting, why the liquid pressure is so high? if is full opened and its not overcharged.


    I'm assuming the compressor is sweating , if you have a system overcharged or with airflow issues or a combination of both the refrigerant just past threw the Evap and does not have a chance to reach the boiling point to change states.

  13. #52
    Join Date
    Jun 2012
    Location
    Pittsburgh PA
    Posts
    57
    Installed new txv today, amazing i now have superheat... Thanks everyone for all your help

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