Enter your username:
Do you want to login or register?
  • Forgot your password?

    Login / Register



    Page 1 of 2 1 2 LastLast
    Results 1 to 20 of 21

    Thread: Ac issues

    1. #1
      Join Date
      Jul 2012
      Location
      eden ga
      Posts
      672
      Country Flag: United States

      Ac issues

      I just put in a ACsystem vac it down no leaks put the pag oil like required then tried to gas it could not get the low side to come up? Anyone have any ideas what wrong. It was 95 here as I was trying to has it.
      Name:  9180BB70-0E0F-4295-8B8D-B1082769989F.jpg
Views: 202
Size:  258.6 KBName:  7834102D-706A-410E-8C9D-BE9D5D945BD5.jpg
Views: 199
Size:  283.7 KBName:  245A8BAF-9309-42D3-BD3F-AB341763442D.jpg
Views: 215
Size:  231.3 KBName:  301E98E7-1390-493E-9FF2-E80560128BF3.jpg
Views: 207
Size:  256.2 KBName:  0AABBC96-AE70-49A9-AAF5-E301656DE2BE.jpg
Views: 203
Size:  214.2 KBName:  9180BB70-0E0F-4295-8B8D-B1082769989F.jpg
Views: 202
Size:  258.6 KB[ATTACH=CONFIG]190310



    2. #2
      Join Date
      Jul 2012
      Location
      eden ga
      Posts
      672
      Country Flag: United States
      I checked to make sure my capaliary tube was clamped in correct spot and it was.

    3. #3
      Join Date
      May 2014
      Location
      Louisville, KY
      Posts
      57
      Country Flag: United States
      I’m assuming the evaporator fan was on high. I’ve had to spray water on the condenser before to help bring down pressures where I could get a full charge.

    4. #4
      Join Date
      Nov 2006
      Location
      Mountain Springs, Texas
      Posts
      4,488
      Country Flag: United States
      Bump up the rpms to 2000 and place the can of refrigerant in water to keep it from getting too cold. Don’t completely submerse it though. Always works for me. Placing a box fan blowing on the evaporator can help too.

      Don
      1969 Camaro - LSA 6L90E AME sub/IRS
      1957 Buick Estate Wagon
      1959 El Camino - Ironworks frame
      1956 Cameo - full C5 suspension/drivetrain
      1959 Apache Fleetside

    5. #5
      Join Date
      Jul 2012
      Location
      eden ga
      Posts
      672
      Country Flag: United States
      I had the 30 pound tank in water and a fan blowing so that’s not my issue. I bumped the RPM up to 1800ish and no change. I have .3 mine gas in it that it should have but I back down the gas and does the same thing. I can’t get the low side to come up.

    6. #6
      Join Date
      Jul 2012
      Location
      eden ga
      Posts
      672
      Country Flag: United States
      I am being told you can’t run the unit on max air it will freeze up. It’s the way the unit is built now.

    7. #7
      Join Date
      Nov 2006
      Location
      Mountain Springs, Texas
      Posts
      4,488
      Country Flag: United States
      Quote Originally Posted by 5spd540 View Post
      I am being told you can’t run the unit on max air it will freeze up. It’s the way the unit is built now.
      What unit is that?
      1969 Camaro - LSA 6L90E AME sub/IRS
      1957 Buick Estate Wagon
      1959 El Camino - Ironworks frame
      1956 Cameo - full C5 suspension/drivetrain
      1959 Apache Fleetside

    8. #8
      Join Date
      Sep 2010
      Location
      Beach Park IL
      Posts
      2,838
      Country Flag: United States
      There is a dial on the capillary tube it may be part of your control panel. Set it so the compressor cycles off at 38-40 degrees based on center vent temperature.
      Donny

      Support your local hot rod shop!

    9. #9
      Join Date
      Jul 2012
      Location
      eden ga
      Posts
      672
      Country Flag: United States
      Quote Originally Posted by dontlifttoshift View Post
      There is a dial on the capillary tube it may be part of your control panel. Set it so the compressor cycles off at 38-40 degrees based on center vent temperature.
      My expansion valve is not adjustable. The company I bought it from sucks and they won’t call me back. I have called 4 times and they tell me a tech will call back when they get a chance.

    10. #10
      Join Date
      Sep 2010
      Location
      Beach Park IL
      Posts
      2,838
      Country Flag: United States
      I am not talking about the expansion valve. You mentioned the capillary tube in an earlier post, I assumed that meant you had a thermostat with a tube inserted into the unit.



      Adjusting this controls when the compressor cycles. If it is set too cold, the unit freezes up.
      Donny

      Support your local hot rod shop!

    11. #11
      Join Date
      Jul 2012
      Location
      eden ga
      Posts
      672
      Country Flag: United States
      Nothing I can do with it will keep it from freezing up other than turn up the temp on the controls in the car.

    12. #12
      Join Date
      Sep 2010
      Location
      Beach Park IL
      Posts
      2,838
      Country Flag: United States
      Right, that's what I am saying. If the manufacturer wasn't a secret, I might be more help.

      This is why Vintage Air uses a thermistor in the case on the GENIV units. That tells the ECU what the temp is, cycling the compressor accordingly so it doesn't freeze up. On the GenII units I have had to hide the thermostat so the customer would quit setting it on kill and freezing the unit.
      Donny

      Support your local hot rod shop!

    13. #13
      Join Date
      Jul 2012
      Location
      eden ga
      Posts
      672
      Country Flag: United States
      Quote Originally Posted by dontlifttoshift View Post
      Right, that's what I am saying. If the manufacturer wasn't a secret, I might be more help.

      This is why Vintage Air uses a thermistor in the case on the GENIV units. That tells the ECU what the temp is, cycling the compressor accordingly so it doesn't freeze up. On the GenII units I have had to hide the thermostat so the customer would quit setting it on kill and freezing the unit.
      It’s a nostalgic air

      - - - Updated - - -

      Quote Originally Posted by dontlifttoshift View Post
      Right, that's what I am saying. If the manufacturer wasn't a secret, I might be more help.

      This is why Vintage Air uses a thermistor in the case on the GENIV units. That tells the ECU what the temp is, cycling the compressor accordingly so it doesn't freeze up. On the GenII units I have had to hide the thermostat so the customer would quit setting it on kill and freezing the unit.
      It’s a nostalgic air

    14. #14
      Join Date
      Sep 2010
      Location
      Beach Park IL
      Posts
      2,838
      Country Flag: United States
      Yeah, this is the thing I am talking about.
      If you are using aftermarket controls they can be mounted in many different
      locations, arrangements, and distance from the unit. The important step is to
      insert the silver probe on the thermostat into the evaporator coil. This probe will
      be inserted into the evaporator coil. The probe MUST go into the coil at least 1.5
      to 2 inches.

      It does not matter where it enters the fins on the evaporator, it is only important
      that it is inserted. There will be a 1/2” round white sticker with a hole under it to
      designate where the probe should be inserted into the evaporator.
      Turning the temperature up to keep from freezing the unit is exactly how it is supposed to work.

      How much R134 did you get into the system?
      Donny

      Support your local hot rod shop!

    15. #15
      Join Date
      Jul 2012
      Location
      eden ga
      Posts
      672
      Country Flag: United States
      1.7 pounds. It’s not weird that the low side is so low?

    16. #16
      Join Date
      Sep 2010
      Location
      Beach Park IL
      Posts
      2,838
      Country Flag: United States
      Not to me......It is the suction side. If it wasn't making cold air, I would be alot more concerned. High side is higher than I would prefer but if it is holding there I wouldn't worry about it.
      Donny

      Support your local hot rod shop!

    17. #17
      Join Date
      Jul 2012
      Location
      eden ga
      Posts
      672
      Country Flag: United States
      I just have never seen a system have so low pressure on the low side.

    18. #18
      Join Date
      Sep 2004
      Location
      Vacaville, CA
      Posts
      127
      Country Flag: United States
      Quote Originally Posted by 5spd540 View Post
      I just have never seen a system have so low pressure on the low side.

      We see that regularly with VA. Not to worry. I used to have a Lexus tech service my VA installs and he said a system can’t possibly work with that low a pressure on the low side. But it does!
      Tim

      67 Camaro RS

      64 Nova SS

    19. #19
      Join Date
      Dec 2006
      Location
      Out of the Burbs of Detroit to SoCal, then onto my ancestral homeland, the woods of Cascadia
      Posts
      1,753
      Country Flag: United States
      Some aftermarket manufacturers intentionally run low suction pressures to address the use of a smaller evap. Refrigerants have a steep boiling point vs pressure curvein thi region, so a few psi suction pressure reduction makes a large change in evaporator cooling. Low suction pressure evaps do run a higher risk of evap freeze-up

      OEM's address this by using larger evaps and higher suction pressures.
      Greg Fast
      (yes, the last name is spelled correctly)

      1970 Camaro RS Clone
      1984 el Camino
      1973 MGB vintage E/Prod race car
      (Soon to be an SCCA H/Prod limited prep)

    20. #20
      Join Date
      Jul 2012
      Location
      eden ga
      Posts
      672
      Country Flag: United States
      Quote Originally Posted by Twentyover View Post
      Some aftermarket manufacturers intentionally run low suction pressures to address the use of a smaller evap. Refrigerants have a steep boiling point vs pressure curvein thi region, so a few psi suction pressure reduction makes a large change in evaporator cooling. Low suction pressure evaps do run a higher risk of evap freeze-up

      OEM's address this by using larger evaps and higher suction pressures.
      So my question is how do you make it cool and not freeze up

    Page 1 of 2 1 2 LastLast




    Advertise on Pro-Touring.com