My question is about AC Condensate Line Not Draining.
Please help. We have had two separate service technicians and after 8 service trips, water is still leaking at our condo.
I have First Co Air Handler (30HX5-240). It started leaking water so we had it serviced.
The AC technician blew nitrogen to the drain line, I guess assuming a clogged drain line.It didn't work. He did it again and this time, he changed the drain pipe to a clear plastic tubing so he can see water draining. Still didnt work. We had him look at the drain pan and it was rusted. He put a new drip pan in and it still leaked. At the 4th service call, he blew nitrogen again, had his son who is also an AC technician, pump the drain forward and backward. We saw some rust debri come out but now water is clear. We also had plumber come to snake it. He put in a T to vent it out. Not visible in picture. Inside ceiling.
We called another big AC company. They said the drip pan wasn't wasnt installed properly. He corrected it and vacuumed the drain and tested it to make sure it was draining. Still leaked. On his return visit, he said it was spitting water and recommended a new unit and said there wasn't anything he could do.
We weren't convinced a new unit was required as the AC is working. Had first service technician come back out and readjusted drain and had drip pan replaced again as it looked like it had a leak. Well, that didn't do the magic trick. We changed the air filter again and tested it. We can see water draining from our test when we pour about 6 bottles in but water was always pooling at the plastic tubing. After unit runs for about 6-8 hours, it then leaks again. I began researching and reading quite a bit and came to the conclusion that we needed to do two things. Put a condensate running trap and cap off the T air vent. I bought the running trap at Home Depot and gave it to AC guy to install. I was confident that this will work. Well, it's still leaking.
Our next step is to open up the drain on the opposite site of the drip pan and connect to the T that we had left on the drain as shown in the picture. The air vent is not visible and a few inches to the left of the the T. I think the unit is drawing air back and it's not able to drain out when unit is running. When unit is off, it drains fine as we can see it from the end of the drain under the vanity.
I also am going to ask the technician to check on refrigerant.
Your expert suggestions is much appreciated. This is keeping me up at night. :-)