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  1. #1

    Question

    Hello all -
    Looking for an answer.
    I'm looking into buying a house - everything looks great except for the outdoor heatpump/Air Conditioning Unit.
    ***
    Noticed that the fins are corroding - they almoest look like ashes below the unit. Can also see "green" on the coils.
    ***
    Any ideas?

    Thanks in advance.

  2. #2
    Join Date
    Nov 2004
    Location
    Naples, Fla.
    Posts
    1,403
    Age, environment and maintenance (or lack off) can all influence coil deterioration.

    Sooner or later, all products succumb to old age. The loss of fins or their deterioration will impact system performance. The more deterioration, the more impact to performance. A qualified tech can make an evaluation of pressures & performance.

  3. #3
    Sounds like the previous owner had a male dog.

  4. #4
    Thanks for the reply.
    What would cause the fins to look like ashes on the ground next to the unit?
    What would cause this? Leaking Freon? Or just age? Would it be best to ask the current owners to replace this before I agree to purchase?

  5. #5
    Could be age and sitting in a pool of water all season or being covered up in the winter with a material that doesn't breathe but often it is the acid in urine that melts the fins away

  6. #6
    Join Date
    Nov 2004
    Location
    Naples, Fla.
    Posts
    1,403
    Age, oxidation, pool chemicals, drier vent location, wrong chemical cleaner used, dog urine just to name a few.

  7. #7
    Join Date
    Nov 2004
    Location
    Naples, Fla.
    Posts
    1,403
    Leaking freon - No. Oxidation is not a sign of leaking freon. In EXTREME cases, if the oxidation or rust goes far enough, it will induce a refrigerant leak. On replacing the unit - that's a point of negotiation, your best bet is to have a professional make a survey of what you have to work with.

  8. #8

    Talking

    The information has been very beneficial - I will have an HVAC Professional look at the damage to determine if the unit needs to be replaced and negotiate from there.
    ***
    I never knew Dog Urine could cause the damage?

  9. #9
    Join Date
    Jan 2005
    Location
    Riverside county
    Posts
    100
    Dod urine can be very damaging and it tastes bad. Sound like the fins are water damaged. Ive seen coils that get hit with sprinkler water and the coil fins get eaten up over time.

  10. #10
    live365 Dog urine can be very damaging and it tastes bad.


    Thats funny I told a new guy to the field that he would need all his senses when troubleshooting, including taste. and hopefully not need the sense of taste very often. LOL

  11. #11
    Join Date
    Jan 2005
    Location
    Riverside county
    Posts
    100
    yes dog urine can and will leave a bad taste in your helpers mouth so limit his exposure. You know I did hear that bat urine is the worst and can cause heart burn.

  12. #12
    Join Date
    Mar 2004
    Location
    Grottoes VA
    Posts
    5,856
    Bat urine has a high ammonia content and you will pass out from the fumes long before it gives you heart burn.
    Karst means cave. So, I search for caves.

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