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  1. #151
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    Re: low high-side pressure, help



    Did you measure the temps of the suction lines entering and leaving the reversing valve?



  2. #152
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    Jul 2006
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    usa
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    Re: low high-side pressure, help

    it sounds like you are closer to getting it. if not what I would do is recovery the refrigerant, return both units to goodman specs, evacuate according to goodman instructions. Then weigh in the factory charge and weigh the additional charge according to what Goodman says - for example .68 oz or each additional foot beyond 15 feet. I have seen it stated to recovery refrigerant for less then 15 feet also.
    If this does not give you a good operating ac then call goodman and say what the ....

  3. #153
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    Re: low high-side pressure, help

    The other thing is where is the expansion valve? I do not have much experience with Goodman but it seems all manufactures have gone with txvs since the high SEER. Could you have a 13SEER Cond and a 10SEER Evap coil?

    A txv might work better anyhow

  4. #154
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    Jun 2009
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    florida
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    Re: low high-side pressure, help

    the epansion orifice is in the front of the case. i am pretty sure its a 13seer handler too. and as far as it having a txv, the handler i removed had a txv and i didnt like it. i would prefer to have an orifice simply because its just less to question its functionality.

  5. #155
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    Re: low high-side pressure, help

    to me a txv is much easier. I've always had good luck with weighing in a charge - estimating distance if I did not install the lineset. Check subcooling and everything works out.

    Since the txv meters the refrigerant by suction temp I'd think you get better performance.

    As for fouling the txv it is just as likely to plug the orifice with a dirty lineset.

  6. #156
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    Re: low high-side pressure, help

    this is true. everyone prefers different things, ive just had better luck with orifices.

  7. #157
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    florida
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    Re: low high-side pressure, help

    i cant see a difference in the temps on the reversing valve. also, when i would pump the system into the condensor to change the orifice, it would hold the pressure in the highside and not bleed back to the lowside, so i think the valve is fine. as for the compressor, im not sure.

  8. #158
    Join Date
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    Re: low high-side pressure, help

    Yep... everything points to the compressor.

  9. #159
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    Re: low high-side pressure, help

    is it likely to have 2 compressors, from 2 separate units, built by different companies, be inefficient? i guess thats my doubt.

  10. #160
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    florida
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    Re: low high-side pressure, help

    one being used but worked when removed other than a leak in the condensing coil(which i fixed) and the other being brand new.

  11. #161
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    Re: low high-side pressure, help

    I have no way of knowing what the other unit did or did not do.

  12. #162
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    Re: low high-side pressure, help

    it had the exact pressure characterisitcis, but it was older and i didnt know much about it, other than it ran but had a leak. it did however have a lower head pressure and a higher suction pressure then normal. like the one i have now.

  13. #163
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    Apr 2001
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    Re: low high-side pressure, help

    What are the make and model number for your compressor?

  14. #164
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    florida
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    Re: low high-side pressure, help

    ill have to take it apart to get them, but it is a recipricating compressor.

  15. #165
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    florida
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    Re: low high-side pressure, help

    i dont know if i told u, but i really appeciate all your help and advice. you have taught me alot in the last week or so

  16. #166
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    Re: low high-side pressure, help

    Glad to help.

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