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S650 AC not working

Discussion in 'Skid Steers' started by phil314, Jun 7, 2019.

  1. phil314

    phil314 Well-Known Member

    Joined:
    Dec 28, 2014
    Messages:
    157
    Location:
    Otsego, Mn
    Tried the AC in my S650 today and I'm getting nothing.
    I flip the AC rocker switch and it lights up green, fan is on, temp set to cold.
    Opening the rear door, I can see the belt turning the compressor pulley, but the compressor clutch is not engaging.
    So I think it's an electrical problem, not a freon/leak problem.
    I think the AC worked last summer, but not 100% sure.
    There are probably some fuses/relay I should check, but no clue where they are on this machine??
    Not yet anyway, I'll probably know soon enough, if someone can point me in a direction??
     
  2. Zewnten

    Zewnten Active Member

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    Apr 2, 2018
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    36
    Location:
    Earth
    Usually two reasons for this and the main one in my experience is lack of refrigerant in the system, any auto repair place should have an AC machine to hook up and check pressures. If that's all good then I would start looking at the electric side, starting with voltages at the compressor and work my way up stream. Do you have any codes?
     
  3. Bls repair

    Bls repair Senior Member

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    Jan 21, 2017
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    Occupation:
    Equipment operator,mechanic
    Location:
    S E Pa
    Ac units usually have hi and low pressure switches for safety . If Freon is low it protects the pump from running and burning the pump up
     
  4. phil314

    phil314 Well-Known Member

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    Dec 28, 2014
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    Location:
    Otsego, Mn
    No codes. Checking the pressures is probably a good idea anyway.
     
  5. phil314

    phil314 Well-Known Member

    Joined:
    Dec 28, 2014
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    157
    Location:
    Otsego, Mn
    This makes sense. It's not turning on on purpose. I'll check the pressure.
     
  6. Bswwood

    Bswwood Active Member

    Joined:
    Jun 20, 2019
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    26
    Location:
    Utah
    The AC rocker switch is notorious for failing, even if it is lit green it may not be sending power to compressor. You can remove the small panel that holds the rocker switch and you will find a three-prong plug on the back, two white wires and one black, but a jumper wire between the two white wires and see if the compressor turns on. If it does not then it may be a problem with low pressure, but I would rule out the switch first. Also the machine will not code for AC issues because the AC is an independent system. There is a thermostat controller that has an LED that will flash codes that is found underneath the cab under the cover for the evaporator.
     
  7. phil314

    phil314 Well-Known Member

    Joined:
    Dec 28, 2014
    Messages:
    157
    Location:
    Otsego, Mn
    Good to know. I'm picking up some gauges later today to check pressure. I'll also check the switch, but I never get that lucky. And I'll check the controller and look for the LED to see if it's flashing codes. I'll report back later when I've done some digging.