Air Conditioning - A/C - Vertical Air Handler & Leak

Good day.

I had a company come out because my air handler was leaking inside the house. Its a vertical 2-ton unit with a slant coil. Apparently there is buildup on the inside of the coil and the buildup at the bottom where the pan drains has clogged. Water drains but not enough and it backs up in the drain pan and comes out of a small weep hole on the side. I tried to vacuum it out from the inside, but I cannot get behind the coil. I dont have experience with this as it is my first home.
The company said they would charge over $300 to "pull and clean" the coil and that was needed. I can see on the top part of the inner-side of the coil some bits of black gunk and can only assume its worse below which causes it to backup.
I am looking for advice on how to clean that out or even clean the inner-side of the coil without having to remove the coil itself... or maybe an alternative to try? Advice?

Many thanks.
KDC

If you have a wet/dry vacuum and can get to the end of the drain pipe from the A/C, hook the vacuum to the drain pipe & suck out all you can. Often this will solve the problem.

Thanks. I have already done this however. Water still comes out. Unit has not been serviced in 2 years which is most likely the cause of the buildup.
From what I have read in these forums it just seems there is an easier way to do this... but nothing I read states this specifically.

Thanks,
KDC

In order to clean what you want you need to use some good 'ol ingenuety.

There are may ways a system like yours can be put together and often you can spy a panel or similar that can be removed to access things.
To save time and grief it can sometimes be worthwhile to cut a hole in a piece of duct if appropriate to more easily service things.

If you carefully study what is required to get at the coil the $300.00 may not be such a bad deal.

One other thing to think about is that if the coil is in the intake side of the fan negative static pressure may make it more difficult for the pan to drain if there is no trap on the drain line near the coil.
This is needed in a lot of cases to prevent suction into the drain line from holding water in the pan.
You can test this by allowing the drain pan to fill up and then shutting off the blower.
If a large flow of water comes when the blower is stopped you need a trap for sure.

Thanks G.
I appreciate the help and will give that a shot and see how it goes.
Unfortunately the unit is encasd in a closet and there is practically no room to move to get at what I need other than through the access-panel side. But I will give that a shot at least and see if that is a concern.
Otherwise, I agree that $300 might not be a bad idea.

Thanks,
KDC

I have on a couple of occasions had to dismantle a closet that the owners thought did a good job of hiding the air handler.