When the AC is in operation, on my AC, the cold A coil in the air handler will produce a lot of condensate dripping from it, as the warm air hits the cold coils. There is a pan below the coil, which has a drain outside the house.
Perhaps your drain is plugged, so the water has found another route? Periodic monthly maintenance here, during AC season, is to put a "pan tab" into the drip pan and drain line, to keep fungus from growing and plugging up the line. ------------- Max Charleston SC On Fri, Jul 23, 2021 at 3:02 PM Randy Bennell via Mercedes < [email protected]> wrote: > My house has a basic HVAC system. We have a gas fired furnace in the > basement and central air installed with the furnace. The evaporator A > coil sits in the warm air plenum above the furnace. The Condenser sits > outside by the back door. The whole setup of furnace and air conditioner > is Lennox and about 5 years old - installed in the summer of 2016. The > previous furnace was Lennox and was installed when the house was new in > 1981. The AC was added later in the summer of 1984. It worked fine and > was still working fine when we replaced it, primarily to get a higher > efficiency furnace. > > The furnace sits near the south wall of the basement and there is a > rectangular duct above the plenum on the unit to feed warmed or cooled > air across the basement from which smaller round ducts carry the air to > the rooms on the 1st and 2nd floors - 2 storey house. There is also a > rectangular duct that provides a cold air return to the vertical duct > that feeds air through the filter at the floor level to the blower in > the bottom of the furnace. > > All very common - nothing unusual. > > The current system appears to be working fine. The house is cool and the > compressor turns on and off like it should. > > However, we are experiencing an issue that we have not seen previously. > The cold air return duct extends from the furnace north across the > basement ceiling. It also extends south but only for a couple of feet > and there are round ducts off of it to pick up air from upstairs. The > issue is that we have water dripping out of the rectangular cold air > return duct on the short side of the furnace. We do not believe we have > ever experienced this before. The electric hot water tank is below the > duct and we have a rectangular plastic wash basin about the size that > fits in a double kitchen sink sitting on top of the hot water tank. I am > emptying it 2 or 3 times each day with and inch or two of water in it. > That means it is a fairly significant drip. I can install a drain on the > duct to take the water down to the floor level and over to the sump pit > but I would like to confirm the source of the water. I have to assume it > is just condensation forming on the inside of the ducting. > > I have looked all over above the cold air return duct and there are no > leaking water pipes or drain pipes that I can identify. I drilled a hole > into the cold air return duct near where it drips and fed a boroscope > (sp?) into it to have a look and I see a little moisture but no puddle > and no frost or ice forming on the metal ducting. > > Water does not appear to be flowing down the cold air return duct to the > bottom of the furnace, or at least not significantly. The filter is not > wet except for maybe 3/4" on the one lower corner. I have pulled the > cover off of the furnace and see no evidence of water infiltration. > > I may drill a couple more holes so that I can look into the plenum above > the furnace to see what the evaporator looks like. > > We have had hot weather (for us anyway). Today it is 30C which is about > 86F. It is humid today as we have had some rain in the past few days. It > has been warm throughout most of July but it was very dry as we had not > had much rain. We were experiencing the water dripping when it was dry > outside as this has existed for all of July. > > We also run a dehumidifier in the basement to keep the moisture level down. > > We have been in this house since 1981 and have never had this issue > before to our knowledge. Certainly not to the extent we have it right > now in any event. I don't go back behind the furnace all that often so > it might have dripped before but if it had done so at the level it is > doing now, it would have flowed out to where it was obvious. > > Anyone have any thoughts on the issue? > > Randy > > > _______________________________________ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
