AC Outdoor Coil Repair in Brooklyn, NY

how-to-troubleshoot-a-central-air-conditioning-system-1Okay, this is an outdoor coil of an old heat pump. Now it’s got a big leak in the coil, and I thought it’s easiest just to go ahead and pull this coil completely out and see if I could find it. I mean, you could hear it hiss so it’s not a question of actually being able to find the leak or finding where the leak is in general. But I want to pinpoint it and I’m going to cap off these lines.

Cap off the Tube

Okay, I’ll cap this off, probably cap the cap tube off here, and then we’ll put a fitting in here to pressure it up with, and then we’ll see if we can find the leak. See I got a gauge set on this thing. If you look up there, I’ve got it all isolated capped off and I’ve got a line tapped there. So I’m just going to be pressuring this thing up. And when I pressure it up, you’ll be able to hear the leak.

Pressure it Up

Okay we’re going to pressure it up. I think it’s probably right here. I’ll pull some fins off and we’ll take a look. If you look real close, right here, that’s just a little bit fatter than the rest. I bet you that’s where our leak is, right there, little bit fatter. Okay we’ll pull some fins off and see what we can find.

Okay, here I pulled some fins off, and if you look there, you can see there’s just a splitting line right here, kind of odd. Looks like, it’s almost like a freeze break or something, like there’s full of water or something. But it’s an air-conditioning coil so it shouldn’t be that. But it’s fattened out there and it’s broken. Now I’m going to pull a few more of those fins off and squish this down so it’s pretty close. And we’ll go ahead and solder it up or braze it up.

Take off the Fins

Okay, I’ve got this — the fins moved off and I’ve kind of squished this back together in preparation to brazing this. So I’m going to go ahead and clean it up and then we’ll braze it.

Okay, there it is. We’re going to go ahead and test it for leaks. I usually, so far, see the leaks like a big leak or it doesn’t leak at all. Okay we got a pressure test on it. Looks like a run in between 205 and 210 and we’re going to leave that on there for awhile and see it stays the same. And if so, we’re back in business.

Okay, I’ve left this thing for about a half hour and it looks like no leaks. So we’re going to go ahead and put this coil back in and see if we can get this thing going.


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