Cleaning an exterior Air Conditioning unit

in DIYHublast month

I was sick today, having come down with a cold that ripped through everyone else in the house before me. I couldn't sleep all day though so rather than waste the time watching The Price is Right reruns, it was as good a day as any to deal with my AC.

I haven't cleaned it since we moved in almost 3 years ago, and I don't think the prior owner had done it in a while either, so it was pretty gunked up and the AC wasn't working too well as a result. We are basically done with summer temps now, but I wanted to get this off my To Do list prior to winter and next summer.

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This was the state of the unit when I opted to clean it. Definitely has a lot of grime built up on it, though the pictures don't fully display its sorry state.

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I bought some generic foaming AC cleaner for the job as I read that it breaks down the gunk on the fins very well. Then it was just a matter of opening up the top, lifting out the fins and motor, and giving me a bit of space to spray.

I didn't get a shot of the foam, but it did expand pretty impressively and you could see it just destroying the buildup of grime.

Once I had sprayed it a few times, I let it sit for about 20 min and then came back to hose it off. This is a self-rinsing solution but I wanted to rinse it anyhow just to be sure I wasn't leaving anything behind in case the condensation the unit creates isn't enough to fully clean it.

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The result, which again isn't as well displayed through the photos, was an amazingly clean AC. It was noticeably cooler in here the next day, which was wonderful.

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Looks like the cleaner might be an effective weedkiller as well, judging by the sorry state of that dandelion. No making dandy tea from that one ! 😁

I need to dig up all those rocks and replace the weed barrier in the WORST way. The folks who owned this place before us had definitely not re-done the barrier in the last like 7 years, so everywhere that I have rocks is a prime place for weeds right now. I wasn't healthy enough last year or the year before to get down and do it, but after the surgery early this year I've been doing great so it's a very high task on next year's spring list.