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R12 evaporator thermostat r134 thermostat

Home Forums Stay Dirty Lounge Service and Repair Questions Answered Here R12 evaporator thermostat r134 thermostat

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  • #452730
    EddygEddyg
    Participant

      (92-95 Honda civic) will a r12 evaporator thermostat sensor fit on a r134 evaporator? And difference??

    Viewing 10 replies - 1 through 10 (of 10 total)
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    • #452731
      MattMatt
      Participant

        Uh, are you talking about a pressure switch? I would hazard to guess that they are different, but I’m not sure if that’s what you are talking about….

        #452734
        MattMatt
        Participant

          Oh, wow, I didn’t know Honda actually used a temp sensor. Learned something new there.

          #452735
          EddygEddyg
          Participant

            Yes they do.. And I just need to if theyre compatible or not and what difference it would make.

            #452736
            MattMatt
            Participant

              I’ll forward this one to Eric. He’s prolly taking tomorrow (today now) off, ‘cuz it’s father’s day. But I bet he will be able to help ya.

              #452732
              EddygEddyg
              Participant

                Idk if it’s a sensor or a switch but it’s mounted in the evaporator. I have a 93 Honda civic with the r12 unit but going to be replacing it with the r134 unit.. The only difference is that the r134 came with the 3 pin plug type (evaporator thermostat) and the r12 came with 2 pin type. I was just wondering if can just switch out the r134 sensor with an r12 sensor and if it would make any difference??

                #452733
                college mancollege man
                Moderator

                  I believe the original R12 t-sat can stay.

                  #452737
                  EddygEddyg
                  Participant

                    Thanks.. i went to the junkyard n grabed a r12 sensor and got it installed now the condenser fan works.. it may just work.

                    #452738
                    RickRick
                    Participant

                      All that the evaporator temp sensor does is cycle the compressor off if the evap gets too cold– that prevents it from icing up. Using the old sensor should be fine as long as it works. If it doesn’t work, then you will slowly lose A/C on hot humid days as ice builds up on the evap preventing air flow.

                      #452739
                      EddygEddyg
                      Participant

                        Cool thanks for the info..

                        #452740
                        EricTheCarGuy 1EricTheCarGuy
                        Keymaster

                          It’s just a temperature sensor placed in the fins of the evaporator, it does not fit into the evaporator itself so there is no direct contact with anything inside the AC system, it’s placement on the evaporator is important but what is in the system R12 or R134a doesn’t matter.

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