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1993 Explorer 2 Door Sport 2WD ALL new A/C problems

Discussion in 'A/C & Heater systems - HVAC' started by InTitusvilleFL, October 6, 2017.

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    1. InTitusvilleFL

      InTitusvilleFL New Member

      Joined:
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      City, State:
      Titusville, FL
      Year, Model & Trim Level:
      1993 Explorer Sport
      I just put "ALL" new A/C parts in. I know some about A/C systems but not operations. I've restored hundreds of 1967 to 1973 in-dash Mustang and Cougar A/C systems but never installed or charged them. I've installed "ALL" completely new parts in a 1992 Mustang and 1994 Mazda B3000 but had someone charge them and didn't watch. This time I had someone do this but now exactly sure if he knew what he was doing. Seems I knew more than he did in some parts of this. We evacuated the system and held pressure so no leaks. We charges the low side to about 50 but he didn't want to go over since he says is could blow the compressor. He seemed to have a problem getting a reading on the high pressure side but finally got about 120 to 130 and told me it should be 250 to 275. The air comes out cool but not cold.

      Question is... What "SHOULD" the pressures be and if the low side is correct why is the high side so low. I'm assuming it's the compressor even though it's new. The pipe part of the high side around the port is really hot. The compressor doesn't cycle and I assume that's because the evaporator isn't getting cold enough to cause the compressor switch to switch off. Any ideas what's going on???
       
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    3. SoHK_alumni

      SoHK_alumni Active Member

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      City, State:
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      Year, Model & Trim Level:
      5.0 V8 2002 Ranger
      With good air flow across condenser and radiator, you should see 35-40 on low side, 185-205 on high.
       
    4. InTitusvilleFL

      InTitusvilleFL New Member

      Joined:
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      City, State:
      Titusville, FL
      Year, Model & Trim Level:
      1993 Explorer Sport
      I brought it to Tire Kingdom and they used "REAL" A/C equipment and were able to get it to 45 low and 200 high but it was still blowing just cool air and not cold enough to cycle the compressor clutch. While I was driving it did get a bit cooler but not by much. By the time I got home it was warm, the evaporator and accumulator were warm but the system had enough pressure to keep the clutch on.

      Right now there is no grill or bumper on this since I had so fix a few rot spots on the radiator support, so there is no obstructed air flow for the condenser or radiator.
       

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