I'm bought and had installed a new central furnace/ac unit. It is a high efficiency furnace at I think 95%. I have had it for one month. All was fine while I was running the air conditioner. I could see the water running out of the hose into my sump pump. The other night I turned the furnace on as the wife was chilly. It came on and heated just fine. I went down to admire my investment and there was a pool of water around it. I opened the bottom of the unit and seen water dripping from the housing of the blower fan and the bottom of the unit had quite a bit of water standing in it. I called the people out to check it out. He told me the drip tray needed adjustment and the raised the drain tube up about an inch to allow a downhill run for the water. After they left I turned the furnace back on and within half an hour there was water running from above the blower fan and down around it and dripping back to the floor again. I turned the A/C back on to cool the house back down and the drip went away. My thoughts are that if it was the drip tray it would drip more with the a/c on than with the furnace on and that the problem is somewhere in the heating system, not the coils or drip tray.

I m bought and had installed a new central furnace/ac unit. It is a high effeciency furnace at I think 95%. I have had it for one month. All was fine while I was running the air conditioner. I could see the water running out of the hose into my sump pump. The other night I turned the furnace on as the wife was chilly. It came on and heated just fine. I went down to admire my investment and there was a pool of water around it. I opened the bottom of the unit and seen water dripping from the housing of the blower fan and the bottom of the unit had quite a bit of water standing in it. I called the people out to check it out. He told me the drip tray needed adjustment and the raised the drain tube up about an inch to allow a downhill run for the water. After they left I turned the furnace back on and within half an hour there was water running from above the blower fan and down around it and dripping back to the floor again. I turned the A/C back on to cool the house back down and the drip went away. My thoughts are that if it was the drip tray it would drip more with the a/c on than with the furnace on and that the problem is somewhere in the heating system, not the coils or drip tray.


The drip is being caused by the furnace itself. It is a condensing furnace and as such creates water vapor as part of the condensing process. You need to have your installer read up on the install manual that came with your furnace and make proper adjustments to the trap or other parts of the furnace itself so it operates properly.