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Flashing A/C light. Yes I checked everything. Just have a question.

Discussion in '2nd Gen. Tacomas (2005-2015)' started by MrFixit420, Aug 18, 2021.

  1. Aug 18, 2021 at 8:20 AM
    #1
    MrFixit420

    MrFixit420 [OP] Well-Known Member

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    2014 tacoma trd 4.0 auto.
    So I checked the resister and replaced the relay to the pump.
    Clutch engages but no cold air.
    I am a retired HVAC tech and have the proper gauges. The gauge I hooked to the LOW side does not move when A/C turned on or off. Did not connect the high side as adapter had a bad o ring.

    My question is since I can see the clutch hook up and spin, can I assume the shaft is broken off going into the pump since the gauges don't move? Just want to make sure I didn't miss something that could cause this.
    Thanks
     
  2. Aug 18, 2021 at 10:04 AM
    #2
    MrFixit420

    MrFixit420 [OP] Well-Known Member

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    Eibach Pro Stage 1 on 2nd clip, 3 leaf Icon AAL's in back.
    I just got back from the shop and they agree the pump is not turning inside.
    OH JOY
    Time for a new pump and all the associated BS needed with it.
    There goes the money for the new front bumper. :mad:
     
    RedWings44, TnShooter and Torspd like this.
  3. Aug 18, 2021 at 11:13 AM
    #3
    No Shoes Nation

    No Shoes Nation Well-Known Member

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    Hmm . . . none as yet, that's why i'm here . . .
    Could be a unique situation here, most of us don't have pumps, we have compressors.
     
    Jimmyh likes this.
  4. Aug 18, 2021 at 11:55 AM
    #4
    TnShooter

    TnShooter The TacomaWorld Stray

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    Sounds like a question for @Jimmyh or or @Dm93.


    When it comes to A/C, I’m not too good.
    I’m better off closing the hood and letting someone else figure it out for me.

    Good luck. Hopefully it isn’t too bad or expensive.
     
    MrFixit420[OP] likes this.
  5. Aug 18, 2021 at 12:40 PM
    #5
    Dm93

    Dm93 Test Don't Guess

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    Is the center part of the clutch turning? Sometimes the rubber damper will separate from the clutch and the clutch will engage but the compressor still won't turn.
     
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  6. Aug 18, 2021 at 4:22 PM
    #6
    MrFixit420

    MrFixit420 [OP] Well-Known Member

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    Compressors are pumps. They pump refrigerant around in circles.
     
  7. Aug 18, 2021 at 4:24 PM
    #7
    MrFixit420

    MrFixit420 [OP] Well-Known Member

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    Everything up front appears to be turning including the center. That is what I was looking for to start with.
    Thanks
     
    Dm93[QUOTED] likes this.
  8. Aug 18, 2021 at 4:30 PM
    #8
    Dm93

    Dm93 Test Don't Guess

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    If it's all turning but not pumping then yea the compressor is done.
    Make sure if the oil is full of metal that you replace the condenser, expansion valve screen, and probably the valve in addition to the compressor and flush the lines and evaporator really good.
     
  9. Aug 18, 2021 at 4:31 PM
    #9
    stevesnj

    stevesnj Well-Known Member

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    They are usually the same thing.
     
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  10. Aug 18, 2021 at 5:05 PM
    #10
    MrFixit420

    MrFixit420 [OP] Well-Known Member

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    The refrigerant and oil look great. Already replacing the filter/condenser as well as full flush, vacuum and refrigerant replacement.
     
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  11. Aug 18, 2021 at 6:07 PM
    #11
    b_r_o

    b_r_o Gnar doggy

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    Are you sure you're hooking up the gauge correctly?
     
  12. Aug 18, 2021 at 7:39 PM
    #12
    Jimmyh

    Jimmyh Well-Known Member

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    Well as stated is the center of the compressor is turning when the clutch engages and there is no pressure the obvious is the compressor is shot. Seems the OP is on the right path.
     
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  13. Aug 18, 2021 at 9:29 PM
    #13
    azzwethinkweiz

    azzwethinkweiz Well-Known Member

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  14. Aug 19, 2021 at 8:52 AM
    #14
    MrFixit420

    MrFixit420 [OP] Well-Known Member

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    If they weren't hooked up correctly they wouldn't show any pressure. I have great pressure it just doesn't change when the pump/compressor turns on.
     
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  15. Aug 19, 2021 at 7:40 PM
    #15
    will.i.was

    will.i.was Well-Known Member

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    Low side should be 100+ psi when off and high will be low like 50psi or so. Once the compressor kicks on, the low will drop to 30-35psi and high around 220ish.

    I checked this in 95* weather the other day and overfilled it a bit, reading at 40psi with ac on high. I just took out enough for the ac to blow really cold (35psi)

    You need to read high side as well for it to be accurate.
     
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  16. Aug 20, 2021 at 3:30 AM
    #16
    Icarus II

    Icarus II Well-Known Member

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    Retired HVAC tech would know that. So would a good mechanic.
     
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  17. Aug 20, 2021 at 4:14 AM
    #17
    Key-Rei

    Key-Rei Well-Known Member

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    FWIW I had the flashing AC button issue for a while and it would come and go randomly the cold would stop but the clutch was engaged etc, only correlation I could make is that I could force it to happen about 50% of the time by driving through a big puddle which got mw thinking it was a slip detected issue, pretty sure it was.


    Also it would take a good hour of driving after disconnecting the battery for it to start blowing cold.

    While obviously not the case in your instance as an independent shop verified pump failure my issue ended up being a worn out belt tensioner.

    I had no other symptoms of a loose belt no squeals no over heating seemed okay when testing it but I replaced my idlers and tensioner and the issue went away, haven't seen it since and the AC comes on within a few short minutes after a battery disconnect.
     
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  18. Aug 20, 2021 at 5:58 AM
    #18
    MrFixit420

    MrFixit420 [OP] Well-Known Member

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    And any HVAC tech know a compressor is a pump and they are called both. Try and keep up.
     
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  19. Aug 20, 2021 at 6:04 AM
    #19
    MrFixit420

    MrFixit420 [OP] Well-Known Member

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    Those pressures are only good at 95*. If it's 75* those pressures will be lower. The gauges have the correct temp to pressure conversion right on them.
    To charge a system properly you need both a high and low gauge connected but to check if the pump is working you only need 1. If the pressure doesn't change when you turn on the compressor it's not working.
     
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  20. Aug 20, 2021 at 6:05 AM
    #20
    MrFixit420

    MrFixit420 [OP] Well-Known Member

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    Thanks
    I wish it was a loose belt.
     

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