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Thread: Low pressure drops instantly

  1. #21
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    Quote Originally Posted by jbhenergy View Post
    Stay bright 8 and mapp gas. Don’t worry about over heating again.


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    Thats what I do often unless the pipes arent exactly fitted tight then Ill braze. Btw your situation does sound like a bad TXV. I guess you have to get a new coil if the txv attached to it or is the txv a bolt on?

  2. #22
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    So when the standing pressure was 155. It was 54°F outside?
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    How many times must one fix something before it is fixed?

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  4. #23
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    Thread Starter
    Yes it was

  5. #24
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    At 54 outside temp, your going to be running close to LP trip pressure. Next time its that cool outside, cover part of the condenser coil to keep the head pressure up, to get a longer run time. easier to do diagnostics then.
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    How many times must one fix something before it is fixed?

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  7. #25
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    Quote Originally Posted by beenthere View Post
    At 54 outside temp, your going to be running close to LP trip pressure. Next time its that cool outside, cover part of the condenser coil to keep the head pressure up, to get a longer run time. easier to do diagnostics then.
    I carry a light weight drop cloth on the truck for this very reason. Wrap the outdoor unit up to get the head over 100*.

    Can also use trash bags as well.

    I know Fieldpiece makes that charging jacket do what but I found a drop closet to be much cheaper.


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  8. #26
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    How long did it take for pressures to equalize after it shut down. Slow would tend to lean towards a restriction, fast would lean towards a charge issue, but this can vary depending on TXV type.

  9. #27
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    Quote Originally Posted by R600a View Post
    It always looks strange to me that the little tube stub that they fill it through is just pinched off and not soldered or anything. It always makes me want to hit it with sta brite 8.

    Sent from the Okie state usin Tapatalk
    Braze in a stubby valve core fitting on that bulb and recharge the bulb, get that thing on the line.

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  11. #28
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    Quote Originally Posted by oldguy1949 View Post
    Sounds like an installer problem instead of equipment problems. Try a wet rag wrapped around the coil side of where your brazeing

  12. #29
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    Quote Originally Posted by kdang View Post
    Am I the only one get lucky with PAYNE or what ?

  13. #30
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    Quote Originally Posted by kdang View Post
    Am I the only one get lucky with PAYNE or what ?
    Something like that.

    Sent from the Okie state usin Tapatalk

  14. #31
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    Quote Originally Posted by kdang View Post
    Am I the only one get lucky with PAYNE or what ?
    Ok, I don’t think I understand. You seem happy about getting lucky with Payne. Often times when a guy talks about getting lucky he is referring to getting screwed. Are you saying you’re happy about getting screwed by Payne?

  15. #32
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    Quote Originally Posted by Nickp276 View Post
    Hello all. I'm new here and have an issue:
    Brand new condenser and air handler installed approximately 30 days ago. Standing Pressure at ambient temperature was 155. Condenser comes on and the low pressure drops all the way down and trips the LP cutoff. Would this be a TXV issue?
    thank you for responding/replying, Nick
    Good possibility...some kind of restriction when the suction drops immediately.

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  17. #33
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    Quote Originally Posted by kdang View Post
    Am I the only one get lucky with PAYNE or what ?
    It's not luck just good install practices you do,imo.

  18. #34
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    Metering device restricted due to bad install practices?
    I do a triple evac with nitro to remove non condensables.

  19. #35
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    So ..... have you fixed this thing , or we just gonna talk about it

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  21. #36
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    Quote Originally Posted by BNME8EZ View Post
    Ok, I don’t think I understand. You seem happy about getting lucky with Payne. Often times when a guy talks about getting lucky he is referring to getting screwed. Are you saying you’re happy about getting screwed by Payne?
    No Siirree I do not like to get screwed It's HURT.

  22. #37
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    I find that when brazing in the suction line of a unit equipped with an expansion valve applying a wet cloth to the bulb on all brands of units is a smart move. The same is true for brazing on a service valve. Kind of short sided to blame the equipment for one's own incompetence.

    We install Payne, Heil, Bryant, Carrier (all the same equipment) and have never experienced this problem or any problems. I'll have to give it to Goodman from turd to a decently engineered unit they've now become. If I'm not wrong Gree is in fact made wholly in China, so I'm not getting your condemnation of Payne's Chinese parts when you're also touting Gree.
    “You don't get paid for the hour. You get paid for the value you bring to the hour.” Jim Rohn

  23. #38
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    Oh lord, the train is off the tracks and fixin to turn into a shit show.

  24. #39
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    Since you're new here I'll let you know these guys like model and serial numbers with maxed out information on your diagnostic lol. It does obviously help answer questions a lot better. But how long has this been going on was it right on start up? Could be a restricted TXV or kinked line possibly. what's the head pressure?

  25. #40
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    Sep 2016
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    Restriction obviously. Find out where. Filter drier, txv, pinched line set, shitty braze, list goes on.

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