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Thread: AC help needed

  1. #1
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    AC help needed

    2007 charger rt
    So I replaced the evap core cause it was leaking, the drier, and compressor is about a year old.
    At 90 degrees outside I got:
    low and high at 101 psi static
    55 low and 255 high with compressor on and system on highest cooling
    at 1500 rpm low was 32 and high stayed at 255
    so...temp out of vents won’t get colder than 70degrees. Before evap
    replacement it was around 55 deg.
    So I’m thinking obstruction on high side?
    Could a bad blend door do it?



  2. #2
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    Did you pull a vacuum on the system before you recharged it?

    Sent from my moto z4 using Tapatalk

  3. #3
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    Angry

    Quote Originally Posted by punisher69 View Post
    Did you pull a vacuum on the system before you recharged it?

    Sent from my moto z4 using Tapatalk

    yes. BUT now I’m thinking 1 1/2 hrs wasn’t enough as I did see bubbles in site glass....moisture

  4. #4
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    Quote Originally Posted by DaBlackBomb View Post
    yes. BUT now I’m thinking 1 1/2 hrs wasn’t enough as I did see bubbles in site glass....moisture
    I always pull as close to 29" of vacuum as I can, turn the pump off and let it sit for about 30 min to watch the gauges and make sure there's no leaks before I recharge. Otherwise it's a waste of refrigerant.

    Sent from my moto z4 using Tapatalk

  5. #5
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    Quote Originally Posted by punisher69 View Post
    I always pull as close to 29" of vacuum as I can, turn the pump off and let it sit for about 30 min to watch the gauges and make sure there's no leaks before I recharge. Otherwise it's a waste of refrigerant.

    Sent from my moto z4 using Tapatalk
    Yep. Did that and no leaks.

  6. #6
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    Those pressures appear normal. I would suspect the blend door? But, I'm wild guessing here?

  7. #7
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    Is the electric radiator fan working?

  8. #8
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    Quote Originally Posted by DaBlackBomb View Post
    I did see bubbles in site glass....moisture
    Bubbles aren't always a sign of charge status, depends on the system load.


    Quote Originally Posted by punisher69 View Post
    I always pull as close to 29" of vacuum as I can, turn the pump off and let it sit for about 30 min to watch the gauges and make sure there's no leaks before I recharge.
    I've had systems hold a vacuum and still leak, I attribute it to the compressor seal which will suck closed tightly under vacuum but leak under pressure.

  9. #9
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    Quote Originally Posted by Root66 View Post
    Bubbles aren't always a sign of charge status, depends on the system load.




    I've had systems hold a vacuum and still leak, I attribute it to the compressor seal which will suck closed tightly under vacuum but leak under pressure.
    Root66,
    can u accurately tell how much refrig is in system without emptying it
    and weighing it ? I took it somewhere and he said I was low almost 1/2 pound but he didn’t empty it.
    car still blows at 70 degrees

  10. #10
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    Quote Originally Posted by Genestealer View Post
    Is the electric radiator fan working?
    Yes

  11. #11
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    Quote Originally Posted by Root66 View Post
    Bubbles aren't always a sign of charge status, depends on the system load.




    I've had systems hold a vacuum and still leak, I attribute it to the compressor seal which will suck closed tightly under vacuum but leak under pressure.
    no dye leaks there or anywhere that I can find.
    only in the evaporator which is why a replaced it

  12. #12
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    Quote Originally Posted by DaBlackBomb View Post
    Root66,
    can u accurately tell how much refrig is in system without emptying it
    and weighing it ? I took it somewhere and he said I was low almost 1/2 pound but he didn’t empty it.
    car still blows at 70 degrees
    Anyone know?

  13. #13
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    Quote Originally Posted by DaBlackBomb View Post
    Root66,
    can u accurately tell how much refrig is in system without emptying it
    and weighing it ?
    No, anything else is just a guess.

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