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What do you guys think about this one?

Discussion in 'Residential' started by Valleycoastjoshua, Jun 3, 2017.

  1. Valleycoastjoshua

    Valleycoastjoshua New Member

    Messages:
    20
    I went to a call last week and it kind of started wrong because the customer talked about replacement and the repair at the same time and quite frankly I would rather sale him a new unit and replace the old one it's 17 years old and icp condenser, Rheem furnace out of warranty and is r22. Anyways the breaker was tripped I turned it back on and everything was working but the suction line was freezing. I checked the filters and they were fine. I checked the pressure
    Ambient 80
    Low side 55 (around 32) line temp around 42,45 superheat approx 10
    High side 275 (around 110) line temp around 80
    Fixed meter devise
    No filter drier
    73 return 55 supply
    Condenser coils were pressed in at a lot of spots

    I suspected the coil being blocked cause low suction and low super heat but the Rheem coil mounted horizontally sucked with me trying to investigate. And I was suspicious of a restriction at the metering devise maybe causing the high supcooling and high head. I added a little r22 and the suction did not increase. I did not fully diagnose the coil blockage due to accessibility and I didn't open the metering devise because it's r22 and I would replace with new charge and the repair is going to be costly if I get involved. I charged him for my service call and some for adding the r22 and confirm it's not low. He may buy a new unit which I'm hopeful of but I do wish I knew what the issue is. I am mostly confused because normally when I imagine a Restictrion super heat is high and with diagnosing the block in Evap coil it was shaped like a w laying sideways and right beside the furnace I couldn't clean it if I wanted.
     
  2. Catpower

    Catpower The Crowd Pleaser

    Messages:
    21,347
    Location:
    in the Cabana
    How can the line be 42-45F and still be freezing?
     
  3. Valleycoastjoshua

    Valleycoastjoshua New Member

    Messages:
    20
    When it wasn't freezing that was the line temp it didn't freeze for a while
     
  4. 22blood

    22blood red wire nuts only

    Messages:
    1,582
    Any charts inside the consensor panel. Like bulb temp/press or PT chart
     
  5. mike1020

    mike1020 entitled millennial

    Messages:
    17,179
    Location:
    SoDoSoPa
    Possibly low airflow
     
    jpb2 likes this.
  6. Catpower

    Catpower The Crowd Pleaser

    Messages:
    21,347
    Location:
    in the Cabana

    Ya need to get some more air over that coil. might be dirty coil, filters, or fan or a combination of them all
     
  7. Valleycoastjoshua

    Valleycoastjoshua New Member

    Messages:
    20
    The high sub cooling didn't indicate any form of restriction
     
  8. Valleycoastjoshua

    Valleycoastjoshua New Member

    Messages:
    20
    I think I put my blinders on when he said he wanted a new unit. Still waiting for him to call back
     
  9. sline-dawg

    sline-dawg schizophrenic psycho

    Messages:
    3,500
    Location:
    Just this side of deranged
    Permafrost..... it's that good......:lachen::lachen::lachen:
     
    Catpower likes this.
  10. Daryl_Dixon

    Daryl_Dixon New Member

    Messages:
    3,357
    Maybe they live in a vacuum
     
  11. Catpower

    Catpower The Crowd Pleaser

    Messages:
    21,347
    Location:
    in the Cabana
    Actually it can, if over the years everybody has been trying to get the low pressure side high enough to stop freezing,so they kept adding refrigerant to raise the pressure,but the restriction causes the unit to run with a starved evap so there isn't as much of a load as the system was designed for, so it just super sub cools
     
    Zman and Valleycoastjoshua like this.
  12. Texas-Tech

    Texas-Tech Official Geezer*

    Messages:
    16,680
    Location:
    duhh
    Could have a dirty evap coil and you just can't see it
     
    mike1020 likes this.
  13. Valleycoastjoshua

    Valleycoastjoshua New Member

    Messages:
    20
    I feel that way. I think I'm going to start just try sale a new evaporator if I run into a messed up one
     
  14. Valleycoastjoshua

    Valleycoastjoshua New Member

    Messages:
    20
    I feel like that is good expo
     
  15. Daryl_Dixon

    Daryl_Dixon New Member

    Messages:
    3,357
    If you clean an obviously dirty evap and it works, you are a hero

    If you clean the obviously dirty evap and it still doesn't work, you have plausible deniability and exercised due diligence

    If you sell them a new evap and it doesn't work, you'll be on 20/20
     
    HMD and Zman like this.
  16. Valleycoastjoshua

    Valleycoastjoshua New Member

    Messages:
    20
    Yeah but if you are suspicious of a meter devise issue you can solve both problems
     
  17. Valleycoastjoshua

    Valleycoastjoshua New Member

    Messages:
    20
    It's easy to diagnose if my condenser is causing the problem generally
     
  18. coldsnap

    coldsnap -20 on the money

    Messages:
    3,884
    Location:
    Wisconsin
    Check the secondary hx too
     
  19. Valleycoastjoshua

    Valleycoastjoshua New Member

    Messages:
    20
    I found that as a issue on a real old unit before I didn't solve it and sold a new one and seen the problem when the installers were pulling it out. But it was very old any ways
     
  20. pintofstout

    pintofstout New Member

    Messages:
    1,461
    Location:
    Olean, NY
    If it's pinched off leaving the condenser then it's going to pile up in the condenser and leave a high subcool.


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