After owning the same room air conditioner in the same place for the last three or four years, it suddenly began dripping water. The condensation is not consistent. It will condense at night or day and at times not drip water at all. Several neighbors with air conditioners never condense water and a couple do. Mystified. Charles

Is this a window or wall unit you speak of? It is normal for these units to leak water. Apparently it must be very humid where you are lately for it to leak water.

There is a drip pan under the evaporator, whose drain holes, or pipe may be clogged with slime, fungus, or grass. Pellets or "pillows" of biocide should be left in the drain pan, to prevent this... Readily available from A.C. shops... Good luck...

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Originally Posted by twinkiedooter

Is this a window or wall unit you speak of? It is normal for these units to leak water. Apparently it must be very humid where you are lately for it to leak water.

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Thanks for the reply. This is a window air conditioner. Perhaps you could take another shot at my post: This is the first summer it has leaked water, the climate is not really humid, S. California, it is does not consistently condense, some other air conditioners of the same make and location do not leak water but one other does, this air conditioner ran for several summers without leaking water. Thank you for any further effort. Charles

It's nothing to worry about. The condensation is normal for any a/c unit. The atmosphere surrounding the unit (including the temperature) has a lot to do with the amount of condensation and the length or time in which it occurs. You may try moving the unit to a different window and perhaps running it on a lower setting for as much time as you can.

Is this condensation dripping on the outside of the building or on the inside? How often do you change the filter or at least clean it? These units have a tendency to freeze over if the filter gets dirty, and then when it melts there is too much to be carried away in the normal way so it overflows.