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Where is the low pressure switch for the ac on a 2003 3.4??

Discussion in '1st Gen. Tacomas (1995-2004)' started by Rmodel65, Apr 8, 2017.

  1. Apr 8, 2017 at 4:21 PM
    #1
    Rmodel65

    Rmodel65 [OP] Yukon Cornelius

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    Trying to find the low pressure switch maybe I'm just blind anyone know where it is?
     
  2. Apr 8, 2017 at 4:41 PM
    #2
    RedManRocket

    RedManRocket Well-Known Member

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    What is a low pressure switch? The knob to turn it off full blast?
     
  3. Apr 8, 2017 at 4:41 PM
    #3
    mechanicjon

    mechanicjon They call me "Jonny Stubs"

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    I think its inside the evap box. Let me check.
     
  4. Apr 8, 2017 at 4:43 PM
    #4
    keakar

    keakar Well-Known Member

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    I think someone said its under the dash right by where the tubing goes into the a/c box
     
  5. Apr 8, 2017 at 4:48 PM
    #5
    mechanicjon

    mechanicjon They call me "Jonny Stubs"

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    There's only a high pressure switch. Its in the evap. case behind glove box.
     
    cruxofthebisquit likes this.
  6. Apr 8, 2017 at 5:11 PM
    #6
    cruxofthebisquit

    cruxofthebisquit Well-Known Member

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    yea, a/c comes on when you turn it on.(your hand is switch) High Press. sw. cuts out compressor when it builds up.
     
  7. Apr 8, 2017 at 5:47 PM
    #7
    Rmodel65

    Rmodel65 [OP] Yukon Cornelius

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    There should be one to protect the compressor if the pressure gets to low??
     
  8. Apr 8, 2017 at 10:23 PM
    #8
    DrZ

    DrZ Well-Known Member

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    Toyota used a dual pressure switch. It will shut of the AC if the freon pressure is too high or too low. On earlier Tacomas the pressure switch connector was on the outside of the evaporator core behind the glove box, but the switch is inside the evaporator core plastic housing. I guess it's probably the same set up on later 1st gens.
     
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  9. Apr 8, 2017 at 11:16 PM
    #9
    mechanicjon

    mechanicjon They call me "Jonny Stubs"

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    the switch is in the liquid line (high pressure line) inside the evap box. The connector is outside the box yes.
     

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