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Why is Neighbor's A/C making Cicada and A-10 "Brtt" sounds?

Steamback
Member Posts: 36
Apologies, I'm a hydronic guy. I did work on A/C units like 20 years ago, but forgot everything.
My Neighbor has an outdoor A/C unit which every 2-3 minutes makes a loud hissing Cicada-like sound for 30 seconds followed by a loud "brrrrrrt" sound like from an A-10 cannon for a few seconds. Very regularly. Like clockwork.
Is this a common problem? Honestly, I can't believe his A/C is still working...it sounds like the outdoor compressor is killing itself.
What's happening?!
My Neighbor has an outdoor A/C unit which every 2-3 minutes makes a loud hissing Cicada-like sound for 30 seconds followed by a loud "brrrrrrt" sound like from an A-10 cannon for a few seconds. Very regularly. Like clockwork.
Is this a common problem? Honestly, I can't believe his A/C is still working...it sounds like the outdoor compressor is killing itself.
What's happening?!
0
Comments
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what does a cicada sound like???0
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Sounds like @Steamback's neighbors A/C unitpedmec said:what does a cicada sound like???
Dah!
almost like a cricket but different.
Here is a video
Edward Young Retired HVAC Contractor & HYDRONICIAN Services first oil burner at age 16 P/T trainer for EH-CC.org1 -
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And like the Cicada, your neighbors air conditioner may be ready to mate with a Female A/C. The opposite sex of an A/C unit. The reverse cycle A/C
AKA Heatpump
And just like the Cicada, after the A/C finishes making that noise and finds a mate, the unit will just die.
Isn't nature just great!Edward Young Retired HVAC Contractor & HYDRONICIAN Services first oil burner at age 16 P/T trainer for EH-CC.org0 -
JUGHNE said:Cicada could sound like a high pressure relief valve opening and then the "brrrr" sound the valve closing and compressor continuing to run. It may die soon.Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment0
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The Cicada noise could be a vibration or rusty motor shaft, the unit not level. The A-10 could be the contactor chattering.0
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