Help me identify the exact source of this leak | Ford Escort Owners Association (FEOA)

Help me identify the exact source of this leak

Discussion in 'HVAC' started by zzyzzx, Nov 22, 2019.

  1. zzyzzx

    zzyzzx FEOA Member

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    Unless I am missing something, this is leaking there the low pressure hose connects to the top of the accumulator. Yes, I used dye when I replaced my compressor. Yes, I used Nylog sealant/lube. Yes, I changed the gaskets. Having written this, I suspect that everything is still working for now.

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    I replaced the accumulator when I replaced the compressor.
  2. FordMan59

    FordMan59 FEOA Member

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    Looks about right to me. Probably a bad O ring. It may have been damaged during installation.
  3. FordMan59

    FordMan59 FEOA Member

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    Looks about right to me. Probably a bad O ring. It may have been damaged during installation.
  4. marclar

    marclar Moderator Staff Member

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    clean it all off, take the spring clamp off the suction hose, and run it. ive seen the fittings leak where they are welded to the hoses. since the oil is up high, indicates leak is high. if it was the lower oring, typically the oil wont go up.
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  5. zzyzzx

    zzyzzx FEOA Member

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    It must have done this when I used the A/C to help out the defrost once. If it matters, it would have been pretty cold out when I did this, and normally, I don't use the A/C with defrost (it's not automatic on this car). It definitely was not like this when I was replacing the head gasket. I would have noticed that.
  6. marclar

    marclar Moderator Staff Member

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    a/c helps defrost a ton. removes moisture from the air before its heated.
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  7. DC Ultra

    DC Ultra FEOA Donator

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    Mine looked just like that when I had fixed my AC last time. Despite how it looked, for me, it was the electric control unit next to that hose that wasn't sealing well and I guess there was some spray? I heard the hiss finally after putting it on vacuum. There was almost no residue at where the electrical connector is screwed in. There was the green accumulation like you have on top of the ring around the low side hose. Which made me think it was leaking there but wasn't.
    2 cents.
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  8. zzyzzx

    zzyzzx FEOA Member

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    So the fix for you was a new O ring or was it the pressure switch (You referred to it as electric control unit)?
  9. marclar

    marclar Moderator Staff Member

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    the cycling switch.. if you suspect a leak, replace it. i agree with dc that sometimes you will get oil next to an area that is leaking.. BUT ac refrigerant is heavier than air, and with the under hood air flow, it is verrrrry unlikely that the PAG oil and dye will go 'up' as seen on the suction hose..
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  10. marclar

    marclar Moderator Staff Member

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    there should be a schrader valve on the accumulator where the cycling switch screws into. under ideal conditions you should be able to remove and replace the switch without recovering and recharging.
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  11. DC Ultra

    DC Ultra FEOA Donator

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    My fix was replacing the O ring. The O ring my new accumulator came with was a bit flat and had this little imperfection on one edge (tho flatness matched my original O ring on my old accumator). When I had removed the switch, I had noticed it was really really easy to twist off. So I dint tighten it down as much as I should have? But anyhow upon second "attempt" I went ahead and changed out to another new O ring. There was dye and freon on the valve for the switch.
    The hiss from the leak is probably not noticeable with any amount of ambient noise. I only barely heard it in the quiet right after turning off the vacuum pump a few times.

  12. zzyzzx

    zzyzzx FEOA Member

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    The leak is where the low pressure line connects, at the spring clamp on the right side of the first picture. I was cleaning it, and had sudsy water on it, and decided to turn it on and see where it would bubble from.
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