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Old 09-19-2016, 12:17 PM   #1
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Wasp nest in roof AC

We have a wasp nest on the roof AC condenser fan blade. Has anyone else had this problem? What is a viable solution? Thought about some kind of screen wire to cover the air vent openings on the shroud. Any ideas would be appreciated.

Mike and Sharon

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Old 09-19-2016, 01:14 PM   #2
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I had a wasp / mud daubber build a nest and stop the fan on a air conditioner. Used wasp spray and removed the blockage and never had a reoccurance.

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Old 09-19-2016, 01:15 PM   #3
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Seems to me that if you fire up the AC, the problem would almost instantly be obliterated.

I would spray liberally with soapy water (or a wasp killing spray if you like) at night when all the critters are at the nest, then remove it all in the morning.
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Old 09-19-2016, 08:53 PM   #4
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You can buy a spray can of wasp spray, shoots 20 ft. I keep a couple around the farm and it works great, best to wait until night time when thy are all on the nest, then eradicate the little boogers with the wasp spray from a distance..
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Old 09-20-2016, 06:49 AM   #5
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Drive north until night time temps get below freezing.
Enjoy a weekend of camping and come home with problem solved.
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Old 09-22-2016, 07:47 AM   #6
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Unknowingly, I had a mud dobber nest on a fan blade. When the air was turned on, I thought the whole A/C was coming apart. Nest had to be scraped off to put fan blades in balance. RV dealer could not recommend a preventative solution.
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Old 09-22-2016, 08:01 AM   #7
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I've put screen over my inlets on most of the AC , but 100% coverage probably not achievable. So far no leaves of wasps found. Fingers crossed.
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Old 09-22-2016, 08:21 AM   #8
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Originally Posted by TDI-Minnie View Post
Drive north until night time temps get below freezing.
Enjoy a weekend of camping and come home with problem solved.
That is NOT a solution.

Wasps spend the winter months in those nests in the north where temps can get as cold as 20-30 degrees below 0 for days on end.

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