2016 A/C Failure at 10K miles, Yay!

Discussion in 'SRT Hellcat General Discussions' started by rwhite692, Jun 22, 2016.

  1. rwhite692

    rwhite692 Silver Member

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    Well, I have run into my very first issue with the car...

    My A/C is not working, all of the electronics are behaving normally, but the system is just blowing hot air. It was working fine the day before.

    Popped the hood to check to see what the A/C compressor is doing, and the clutch on the compressor is not engaging when the A/C is turned on.

    Checked all of the A/C related fuses, and all are OK.

    Going to the dealer tomorrow, so we'll see. Hopefully its something simple.

    Of course, here in CA we are entering a triple-digit heat wave, over the next week or so.
     
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  2. 45colt

    45colt Gold Member

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    We'll that sucks - Hope it is a quick fix
    Good luck to ya
     
  3. Deadcrustpunk

    Deadcrustpunk Senior Hellcat Member

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    I'm willing to bet either the coil on the clutch is toasted or there's a loose wire/harness if you have a voltimeter, you can see if it's the coil or not.
     
  4. rwhite692

    rwhite692 Silver Member

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    Checked all the fuses, Not about to ohm out the clutch solenoid (its not all that easily accessible). I'm under warranty, so we'll see what they find tomorrow.
     
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  5. Deadcrustpunk

    Deadcrustpunk Senior Hellcat Member

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    If you pull the fuse out put your meter to resistance (ohms) and go to ground. Check which side of the fuse is power and then check the other to the frame, if it is under 1 ohm the coil is torched, if the meter reads open or OL the coil or wires are open.either way i'm with you on having them check it out, i usually do that stuff just for my own info, if you turn it on and you have no power on either side of the fuse cavity then the problem could be a much bigger headache- like a loose connection, or even an output module that has a bad channel-. Sorry this is what i do for a living. But checking resistance on any coil from a solenoid to an amplifier is pretty much the same thing. You wont hurt it at all-
     
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  6. rwhite692

    rwhite692 Silver Member

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    Yep I know how to check it, this just happened tonight...Need to get it fixed and have no time to mess with it...I did quickly check to see I had power at both sides of all the relevant fuses with my test light. But as you say, the clutch solenoid coil could be open.

    Everything I am reading says that the more likely culprit for A/C failure on the LX cars is the control module on the firewall which apparently has a pretty significant failure rate...
     
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  7. Deadcrustpunk

    Deadcrustpunk Senior Hellcat Member

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    I figured as much, i dont blame you. Our triple digit weather is really hitting us hard. These fires arent helping us either (sorry i am assuming you are in la,oc, or i.e.) you're making the right call-
    The failure of that control module just has disaster written all over it... alllll bad :( let us know how long your turnaround is-. I would like to know
     
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  8. Catless

    Catless Silver Member

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    Could be lost Freon charge.
     
  9. Jungle Cat

    Jungle Cat Silver Member

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    Ac? You don't need it. I thought you guys had dry heat?
     
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  10. Fastcat ny

    Fastcat ny Silver Member

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    Loss of freon . When the pressures become to high or low the system has pressure cutoff switches to prevent damage to the system . A simple set is gauges hooked up will tell the story. My guess is a small leak shouldn't be a big dea to fix and quick too.
     
  11. rwhite692

    rwhite692 Silver Member

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    Dealer tech diagnosis is that the fault is with the ECM.

    The ECM controls the A/C compressor clutch and it is not sending out the GND output, to turn on the A/C clutch solenoid. They are overnighting a new ECM.
     
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  12. Steppenwolf

    Steppenwolf VIP Hellcat Member

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    Glad to hear you got an answer to what caused it. Hoping not to have this issue on my 2016, but my area of the U.S. rarely sees the summer temps you do in Calif.
     
  13. Deadcrustpunk

    Deadcrustpunk Senior Hellcat Member

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    Wow, you got your answer really quickly, bummer that it wound up being your control module, but the answer came fast
     
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  14. rwhite692

    rwhite692 Silver Member

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    So today, the new ECM comes in, they installed it.

    A/C compressor now turns..... and they discover that the high pressure side line, coming off the A/C compressor is leaking like crazy.

    Of course, there are no replacement lines available, because no one stocks anything.

    They ordered a new line and put my case as "VOR" (high priority) status.

    There are two other Hellcats nationwide that are sidelined with the exact same problem, also waiting for replacement lines (the lines are hellcat-specific), which have been shipped out from the line manufacturer, and are expected to make their way to dealers through the parts supply network early next week.

    The tech cannot explain the relationship between the apparent ECM issue (not engaging the compressor clutch) and the coolant leak.

    Perhaps the clutch driver circuit in the ECM failed, due to over-cycling, trying to keep up with the coolant leak?

    Such Fun!
     
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  15. MABBRYFL30

    MABBRYFL30 NYS President Hellcat Car Club Gold Supporting Member

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    if the system is low on charge it will not blow cold air and may only be slightly cold. if you say the compressor is coming on that is good I guess, refrig
     

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