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Old 06-22-2014, 04:21 PM   #1
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Rooftop AC Cleaning & Maintaince

Does anyone take off the rooftop covers and clean their ac units? I'm not having any problems but just wondering if there is anything that needs to be blown out or washed!!.
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Old 06-22-2014, 04:27 PM   #2
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It's routine maintenance. I did it once a year. You'll get varying opinions.
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Old 06-22-2014, 06:50 PM   #3
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YUP--use the coil cleaner every couple of 3 years if you can. Probably obvious, but spray the water in the opposite direction of the air flow so any loosen debris is blown back out on to the coach roof. The external coil is easy, and gets most of the dirt from the outside environment. The inside coil can get dirty too if you dont keep up with you dusting [smile]. Note, I didnt use the term "evaporator and condessor" coils as heat pumps reverse the coils functions.
PS--If you clean older coils, you may actually cause them to start leaking. Sometimes its the external crud that provides the final barrier--I know this is true with old radiators....
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Old 06-22-2014, 06:55 PM   #4
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I used the coil cleaner after 10 years, with good results, it did improve cooling.
Discussion here on IRV2 with a video. Air Conditioner coil cleaning
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Old 06-23-2014, 08:30 AM   #5
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I did my 2 units a couple of weeks ago, cleaned coils with spray cleaner and hosed out. It was kind of disappointing as very little foreign material came out, but my A/C's have been working just fine so maybe should not be a suprise.
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Old 06-24-2014, 02:24 PM   #6
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Quote:
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I used the coil cleaner after 10 years, with good results, it did improve cooling.
Discussion here on IRV2 with a video. Air Conditioner coil cleaning
As mentioned in the old posting, make sure what ever you use is not acid based. Acid and aluminum fins don't mix well.

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Old 06-24-2014, 02:59 PM   #7
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Web 14 oz. Condenser Coil Cleaner-WCOIL at The Home Depot

I use this every 6 months or 1 yr depending on travels. I use it on the radiators as well. Amazing stuff that really works. If you haven't cleaned in a long time you will feel a difference inside.
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Old 06-10-2015, 02:57 PM   #8
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Cleaning Rooftop fins in a/c units

My only worry is after cleaning and flushing them out, can't that solution mess up your paint jobs with the runoff? Thx.
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Old 06-10-2015, 03:26 PM   #9
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My only worry is after cleaning and flushing them out, can't that solution mess up your paint jobs with the runoff? Thx.

It won't if you rinse it real good. I've used coil cleaner for years.
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Old 06-10-2015, 06:27 PM   #10
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One more A/C tip. From inside, snug the the attachment nuts that will tighten the seal which shrinks with age/weight.
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Old 06-11-2015, 06:22 AM   #11
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We got stuck once in Memphis in 95 heat and 80% humidity with a front AC that quit working. Turned out to be a dirty evaporator coil. After that, I opened up the AC units once a year to clean them.

The photo below shows how much stuff had accumulated after about 6 years of never having cleaned the coils. Note that the debris will be on the inside of the coil. You probably won't be able see it without removing the shroud and inner baffle.

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Old 06-11-2015, 06:41 AM   #12
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Just rinse them out with a garden hose once in a while. Make sure the drain holes are open or it will rain inside. That is not fun.
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