Why does my furnace keep filling with water?
Why does my furnace keep filling with water? Again, the most common reason for a leaking furnace is a condensation leak. If the cause of the leaking water is condensation, there are a few possibilities. You might have a clogged condensation drain or tubing, a break in the condensation line, or issues with the condensate pump, if you have one. Why is there water under my furnace when AC is on? Clogged Drain: Your AC unit is going to produce some condensation, especially on those hot and humid NYC days. If your evaporator coil is not functioning properly this could...