AC pan not draining well, after 2 visits AC guy says call a plumber

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. AC guys cleaned the line out

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Might need a pic to see your setup. If he just cleaned out the condensate line (PVC) coming out of your unit, he must be saying your drain that condensate line ties into is clogged.

Can either call a plumber or try to clear it yourself. Pic would help us help you with a DIY solution.

AC man says the drain lines are clear. He thinks the drain vent is clogged, but he doesn’t work on those. He suggested that I call a plumber.

And I just made an appointment with the plumber for tomorrow.

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AC man says the drain lines are clear. He thinks the drain vent is clogged, but he doesn’t work on those. He suggested that I call a plumber.

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If a drain vent is clogged it creates a vacuum and either nothing will go down, or it will only go down very slowly. Do as the other poster suggested and see if you can clean it out using a hose. If the water backs up and overflows from the top of the vent you have a large clog and should probably hire a pro.

I fixed a similar situation at a rental a couple of weeks ago. The unit was in a hall closet and leaked into the hallway.

The condensate drain feed into the plumbing at a P-trap. I blew out the pvc, but the P-Trap continuted to fill up.

I used a hand held snake and cleaned it out. Then took a garden hose and flushed it. The pipe drained all the water coming from the hose.

My AC guys typically will clear the clog regardless of where the plug is. But I can certainly see them asking for the plumber to tag team if necessary.

If the line goes outside, shop vac it.
If it goes into a vent stack, so go into a bath sink area. See where the A/C unit tail line goes. That’s where you start.

just a word of advice from a recent experience.
I had all my AC equipment replaced a few years ago. Never had an issue with the drain clogging before.
Started having issues a few months after they installed everything with the drain clogging and the drip pan filling up.
They'd come out and blow it and pour some vinegar mixture down and it would be ok for a while then i'd have the problem again a few months later.
i figured there was some attic insulation that got into the drain line during installation. just needed to get it out.

My complaint was that this was happening every so often, and it never did before, so what changed?
they brought the owner of the AC company out, and he noticed immediately that there was no valve between the unit and the drain vent where you blow the air through. SO when they woudl blow the air, maybe some was going down the drain, but more than likely most was going back into the unit. there needs to be a valve there to close when you are blowing the drain to ensure all the compressed air goes down the drain.

they put valves on, blew it out, and i haven't had an issue with clogged drains since then.

so long story short, make sure there's valves in place, b/c if not then they aren't really accomplishing anything by trying to blow the line clean.

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AC guys cleaned the line out

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Did you see how he "cleaned it out"? You need to use AT LEAST compressed air, and if you really want a clean line, force water through it. If he just stuck a wire, like a "fishing" wire, he may have just moved the clog. Also, their may be a P-trap that is blocked.

Your AC has 2 drains. One for the unit and another to drain the pan. Obviously the pan line is clogged. The line should have a T in it. You need to block that off and push compressed air from the pan opening.

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Pros often use a blast of air from a cylinder to clear condensate lines.

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Not sure this was the same procedure but I had an A/C guy blast air into some line to clear it one time. He said to put a towel in every bathroom sink before blasting. I looked at the towels after the blast and there was a bunch of that funky black crud buildup you see in the drains of bathroom sinks. If we didn’t put towels down, it would have made a huge mess.

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So now with the lines clear the pan is still filling up and repeatedly tripping that switch. AC guy said that he thinks the drain vent line is probably clogged with debris and to call a plumber.

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cut the drain line near the unit, put a rag around the downstream pipe and blow hard with your mouth, if you can blow, its clear, if not, its clogged so get an air compressor and blow it out.

this isnt rocket science, so no need to pay a guy for doing this.

now, that said, is there a cap on the drain line? or is it left open in the closet?

it needs a cap or it sucks in air, preventing the unit from draining until the unit shuts off and the fan stops.

also, get another a/c guy, because that guy is an idiot if he didnt do as i described for you above. doing that is standard routine troubleshooting drain issues