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1995brave's avatar
1995brave
Nomad
Jun 12, 2018

It's too hot! AC quit.

2012 Ram went to work Friday morning AC working great. Got out of work 9 hours later (98 degrees out) started up the truck, turned on the AC knew it would take a little while to cool down, drove all the way home and it never cooled down. Picked up one of the recharge kits with low pressure gauge. Followed directions, compressor turning on, gauge shows in the green, high side line getting very hot, not getting cold. Picking up full set of gauges tomorrow from HF to check out high side pressure. Any ideas on what could be stopping it from working? Did a google search with no real help everything was for Gen 2 and 4 Rams, mine is Gen 4.
Tow Vehicles
  • colliehauler's avatar
    colliehauler
    Explorer III
    Jun 19, 2018
    Just had my fan clutch, condenser, hoses, drier, and compressor on my 06 Ford replaced. They flushed the evaporator. The only way they would warranty the compressor was to replace the drier and condenser. They said the condenser was a parallel design and no way to flush contaminates out of it. Was told not a issue to flush the evaporator.

    If anyone should know A/C it would probably be a resident of Arizona. :B
  • colliehauler's avatar
    colliehauler
    Explorer III
    Jun 19, 2018
    Just curious Huntindog wouldn't any remaining flush solvent boil out when you put a vacuum on the system?
  • marcsbigfoot20b's avatar
    marcsbigfoot20b
    Explorer
    Jun 19, 2018
    When I flush a system it’s professional grade flush solvents one way, then the other way then one more time, all with 120 psi.
    Each major component separate , ie: evap, condenser.
    Blow through till you can’t smell anything. Make sure ther is ample air flow through suspected parts, no blockage.
    Vac it down for 2 hours then check for leak back.

    90% chance it will be good.
  • Huntindog's avatar
    Huntindog
    Explorer
    Jun 20, 2018
    colliehauler wrote:
    Just curious Huntindog wouldn't any remaining flush solvent boil out when you put a vacuum on the system?
    No. Yes the liquid component will disappear. But it will leave behind a dry residue, which then will be carried thru the system with the refrigerent.

    The safest way to flush is to use a refrigerent flushing machine. But few have them as they are quite expensive. My GM shop manual states that this is the ONLY acceptable procedure.
  • Huntindog's avatar
    Huntindog
    Explorer
    Jun 20, 2018
    marcsbigfoot20b27 wrote:
    When I flush a system it’s professional grade flush solvents one way, then the other way then one more time, all with 120 psi.
    Each major component separate , ie: evap, condenser.
    Blow through till you can’t smell anything. Make sure ther is ample air flow through suspected parts, no blockage.
    Vac it down for 2 hours then check for leak back.

    90% chance it will be good.


    And that means a 10% chance it won't.

    This is not a small risk, as a failure will mean replacing EVERYTHING again.

    AC is not an area where it can be "good enough". It has to be PERFECTLY clean.

    Anything left in the system will cause it to fail.

    Your money, your choice

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