We just moved into our new place. So many new things need to learn. Just like the problematic AC. My apologizes if I do not know the correct terminology for some of the parts. I will try my best though.

The air handler with evaporator was installed in a closet on the 2nd floor. The evaporator is at the bottom in the air handler unit. And there is a big hole on the floor plywood right underneath the air handler to let the return air come in.

So the problem we have is that if we run the A/C for about 1.5 to 2 hours, we can see water drips to the ceiling of the first floor. And there is a water mark on the ceiling. So I just drilled a hole and let the water run down to avoid further damage. And I also took a picture through the hole to see what is going on(the filter has been removed). I saw condensate forming on the bottom of the drain pan. I'm not sure if the coil sweating.

What I've found/tested are:

• The main drain pan seems working okay. I can see it catches water and let it go away through the pipe to the drain-line. But the pan is dirty. And it seems not overflowed.
• Looks like there is no backup drain pan so the condensate drops directly on the ceiling.
• The filter is a washable filter and has been cleaned.
• Tried to put a dehumidifier in the closed but didn't help too much.

I'm not sure what I can do next to fix this problem permanently. I thought I should install a secondary pan and clean the coil regularly. Am I on the right path? If you get an idea, please let me know.

Thanks!

We just moved into our new place. So many new things need to learn. Just like the problematic AC. My apologizes if I do not know the correct terminology for some of the parts. I will try my best though.

The air handler with evaporator was installed in a closet on the 2nd floor. The evaporator is at the bottom in the air handler unit. And there is a big hole on the floor plywood right underneath the air handler to let the return air come in.

So the problem we have is that if we run the A/C for about 1.5 to 2 hours, we can see water drips to the ceiling of the first floor. And there is a water mark on the ceiling. So I just drilled a hole and let the water run down to avoid further damage. And I also took a picture through the hole to see what is going on(the filter has been removed). I saw condensate forming on the bottom of the drain pan. I'm not sure if the coil sweating.

What I've found/tested are:

• The main drain pan seems working okay. I can see it catches water and let it go away through the pipe to the drain-line. But the pan is dirty. And it seems not overflowed.
• Looks like there is no backup drain pan so the condensate drops directly on the ceiling.
• The filter is a washable filter and has been cleaned.
• Tried to put a dehumidifier in the closed but didn't help too much.

I'm not sure what I can do next to fix this problem permanently. I thought I should install a secondary pan and clean the coil regularly. Am I on the right path? If you get an idea, please let me know.