Condensation on floor daily


Old 09-10-20, 07:15 AM
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Condensation on floor daily

We have a house with a slab floor. The AC unit (a Trane XL1200) sits at the corner of the house outside the master bedroom, with piping under the slab between it and the heating and cooling unit inside. Most mornings when I get up the floor is wet and cold on a line between the two. What could be causing that? It was just occasional at first, but seems to be daily now.
Old 09-10-20, 09:07 AM
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Possibly the piping connecting the two parts of your AC system. I would assume they are not insulated as well (at all) as they should be.
Old 09-10-20, 09:17 AM
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The supply line is cold, if not insulated, or not enough insulation then like a cold beer on a hot muggy day your going to get condensation. If that line is in/under the slab then that would make sense!
Old 09-10-20, 09:41 PM
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The copper refrigerant lines are supposed to be sleeved thru PVC pipe. That usually stops that problem. If your refrigerant lines are in direct contact to the concrete floor you could be in for short life on the copper lines.
Old 09-12-20, 08:30 AM
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What is your indoor humidity like? Agreed that the vapor line returning to the condenser is cold and can attract humidity but the air conditioning system should be removing the humidity from the home.

Most likely the condensate drain pipe also runs that same route to the outside, so I could see where the accumulation of cool water could perhaps be mistaken for condensation... Find the condensate drain pipe on the outside of the home and attach a shop vacuum prepared for water. [BTW, this is an excellent opportunity to clean your indoor coils, so consider going to the orange or blue store and getting some aerosol evaporator coil cleaner] Suck that drain pipe while pouring or spraying water inside on the evaporator coils/coil pan. A clean, (new) pump bug sprayer works pretty good if you are not keen on dragging a garden hose into the house. The evaporator (inside air handler) pan should drain free (and clear water) without the vacuum, when you are done.

Please return and let us know how you fix this annoyance, even if you resort to hiring a professional. It is your report and feedback that will make this thread complete.
Good luck and "Fix it if you can..."

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