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  1. #1

    Question Third unid condo/ AC unit blows no cool air at all.

    Hello. Please someone must advice me before I go crazy.

    I live on a third floor condo unit.the AC is inside the condo, this what has been done, by a HVAC tech.


    • I did a flush back in the coil, using a 50 PSI. Both supply water and return water came out rusty, muddy and with tiny pieces of stone.
    • The supply water came out at 48 grades Fahrenheit, which is good, but the pressure on the supply water is slower.
    • The two pipes –supply and return were closed and a flush back was done only on the coil and the coil was open both sides – return and supply.
    • Then I opened the supply water and the water came out less muddy, but I still had slow PSI problem.
    • Then I open the return and we did the flush back to the coil again and the return water had less muddy water than the supply. In the return PSI looked much better.
    • Then I opened the two valves –supply and return- and flushed back the coil out with the two valves open and the water seemed to come out clear, BUT I was still having the same problem with the coil that was no cooling.
    The discharging temperature was still the same as we begin, which was 69 Fahrenheit.

    Now the follow is what management tells me to do, bottom line is NO ONE wants to perform what managements requests me to do in order for them to solve my problem.

    There is a blockage in your coil and no bleeder valves on either end of your coil to flush the coil out, it would appear to me that the only solution would be to cut the coil at the point where the blockage appears to be, remove the blockage and solder the coil back together.

    Again, no HVAC company wants to deal with it, because that issue will return and then they will have to fix it again, again and again.

    Please any good advice will be appreciated . Thank You!!

  2. #2
    Join Date
    Apr 2011
    Location
    Greenville, IL
    Posts
    6

    Blocked water coil?

    Ernesto,

    What kind of unit is your AC? It sounds like a Geothermal console unit or a Hydronic (Water coil) that has lake, pond, or river, or well water running through it with a fan to blow across the cool water coil in order to cool your condo.

    It sounds like there is mud, sand, rocks, or debris has gotten stuck in the coil from wherever the water is coming from.

    If it is a geothermal or hydronic coil the service tech should be able to cut the lines before the unit and install boiler drains. This would allow them to connect a hose using a submersible pump and some nickle safe coil cleaner or muriatic acid in a 5 gallon bucket to flush out the coil.

    You may need to set up a bi-annual service contract and have it flushed regularly to keep it clean, or if you like to do your own maintenance you can purchase the pump, hoses, bucket, and cleaning solution to be able to do it regularly yourself.

    I would also recommend installing a sediment/sand filter that would have to be cleaned or replaced as part of your service contract, or request to have a filter installed that you will be able to clean or replace yourself.

    I hope this is helpful. Have a good day.

  3. #3
    Thank you for your answer. later on I will let you know what kind of unit I have. Your recommendation is pretty much what managements recommends me to do, correct? I know nothing about HVAC.

    What kind of unit is your AC? It sounds like a Geothermal console unit or a Hydronic (Water coil) that has lake, pond, or river, or well water running through it with a fan to blow across the cool water coil in order to cool your condo.

    It sounds like there is mud, sand, rocks, or debris has gotten stuck in the coil from wherever the water is coming from.

    If it is a geothermal or hydronic coil the service tech should be able to cut the lines before the unit and install boiler drains. This would allow them to connect a hose using a submersible pump and some nickle safe coil cleaner or muriatic acid in a 5 gallon bucket to flush out the coil.

    You may need to set up a bi-annual service contract and have it flushed regularly to keep it clean, or if you like to do your own maintenance you can purchase the pump, hoses, bucket, and cleaning solution to be able to do it regularly yourself.

    I would also recommend installing a sediment/sand filter that would have to be cleaned or replaced as part of your service contract, or request to have a filter installed that you will be able to clean or replace yourself.

    I hope this is helpful. Have a good day.[/QUOTE]

  4. #4
    Join Date
    Feb 2010
    Location
    In a boiler room
    Posts
    7,119
    Welcome to the forum guys.

    This is the wrong area for discussions about HVAC problems. Please read the header above.^^

    A good place to repost this question would be the Geothermal area. You will get more replies over there.

  5. #5

    I have no access to the Geothermal area. why?

    I have no access to the Geothermal area. why?
    Quote Originally Posted by chuckcrj View Post
    Welcome to the forum guys.

    This is the wrong area for discussions about HVAC problems. Please read the header above.^^

    A good place to repost this question would be the Geothermal area. You will get more replies over there.

  6. #6
    Join Date
    Feb 2010
    Location
    In a boiler room
    Posts
    7,119
    Quote Originally Posted by Ernesto View Post
    I have no access to the Geothermal area. why?
    Maybe you tried the pro geo section. Go to the list of forums and right under the General area you will see Going Green, Geothermal.

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