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DewLess's avatar
DewLess
Explorer
Sep 24, 2019

1996 Pace Arrow A/C Question/Help

96 PA that a/c has quit. Working perfectly before fueling up and then failure for rest of trip. Had a remainder of a/c pro can to apply refge fill. Gauge read to stop because compressor is not working. Attached is a picture of suspected parts which I suspect after checking wiring for rodent meals. local cannot get to next week late
I do know function of these 2 pressure switches
Can anyone help ?.
  • Ava's avatar
    Ava
    Explorer
    Sep 25, 2019
    One or the other look like a low pressure switches. If it detects low pressure, the compressor will not engage so as to not damage it. You can jump the wires together on a low pressure switch for a moment and if the compressor engages, the system needs recharging. Hope that is a start for you
  • haydoracin's avatar
    haydoracin
    Explorer
    Sep 25, 2019
    Ava wrote:
    One or the other look like a low pressure switches. If it detects low pressure, the compressor will not engage so as to not damage it. You can jump the wires together on a low pressure switch for a moment and if the compressor engages, the system needs recharging. Hope that is a start for you


    On my 1995 Chevy Blazer when the mechanic jumpered across the pressure switch with a paper clip and the compressor started he replaced the switch. Working fine since then.
  • Chrisatthebeach's avatar
    Chrisatthebeach
    Explorer
    Sep 25, 2019
    The one on the left appears to be the low pressure switch.
    Unplug and jump the two with a paperclip, that will make the compressor start and the refrigerant will fill.
    Just because it is old does not mean it all needs replacement, I use a 1996 Explorer as my beater and it still has cold air at 300k miles.
  • DewLess's avatar
    DewLess
    Explorer
    Sep 25, 2019
    Very good information so far, I must have a switch/sensor further up-line to cut power to pressure sensor . I have no voltage at sensor plugs nor does a/c button on dash control thus thinkin of mouse food. Access to heater box is next step to find a switch
  • RLS7201's avatar
    RLS7201
    Explorer II
    Sep 25, 2019
    You have a Denso HVAC system. In the link click on downloads for wiring prints.

    Also in that era of Ford chassis, Ford left a connection for the AC behind the dash, up high. Fleetwood put an inline 20 amp fuse on that wire for the AC.

    If you need to get into the heater/AC compartment, just look for the 4 screws in the kick panel forward of the passengers feet.


    Richard
  • RLS7201's avatar
    RLS7201
    Explorer II
    Sep 25, 2019
    Lwiddis wrote:
    Twenty-three year old A/C? Replace all components IMO.


    Nice to see a little humor on the forum.

    Richard
  • DewLess's avatar
    DewLess
    Explorer
    Sep 25, 2019
    RLS7201 wrote:
    You have a Denso HVAC system. In the link click on downloads for wiring prints.

    Also in that era of Ford chassis, Ford left a connection for the AC behind the dash, up high. Fleetwood put an inline 20 amp fuse on that wire for the AC.

    If you need to get into the heater/AC compartment, just look for the 4 screws in the kick panel forward of the passengers feet.


    Richard


    THX Richard for the link, those schematics are what I was needing. Some honey doos have come up with mh goin on back burner. Not so bad I suppose with house A/C going.
  • DewLess's avatar
    DewLess
    Explorer
    Sep 25, 2019
    Lwiddis wrote:
    Twenty-three year old A/C? Replace all components IMO.

    At 23 years old does not mean all parts are original, The Old Girl has been nice to me,

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