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knocking noise when a/c runs

Discussion of AC's, plumbing and sanitation related issues.
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Topic author United States of America
talieho
Scurvy Dog
Scurvy Dog
Posts: 3
Joined: January 26th, 2020, 6:30 pm
Vessel Info: 1986 motor cockpit
Location: Marblehead, OH

knocking noise when a/c runs

Postby talieho » July 12th, 2020, 10:05 pm

i have an 1987 4227 cockpit motor yacht. Recently started to hear a noise at the back of the boat on the starboard side only when then a/c is running. Sounds like a baffle has come loose. There is a cavity that is inaccessible. Both the starboard engine exhaust and a/c pump line lead to this cavity which is exactly where the noise comes from.
Any thoughts on what this issue is or possible solution would be greatly appreciated.

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United States of America
g36
Admiral
Admiral
Posts: 1937
Joined: April 7th, 2014, 6:07 pm
Vessel Info: 1997 Carver 405
Location: Soddy Daisy TN.
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Re: knocking noise when a/c runs

Postby g36 » July 13th, 2020, 12:53 pm

Compressor maybe. Something in fan?
1997 Carver 405
Crusader xli
The Black Pearl
Soddy Daisy Tn.
User avatar

Topic author United States of America
talieho
Scurvy Dog
Scurvy Dog
Posts: 3
Joined: January 26th, 2020, 6:30 pm
Vessel Info: 1986 motor cockpit
Location: Marblehead, OH

Re: knocking noise when a/c runs

Postby talieho » July 13th, 2020, 4:37 pm

Thanks for the reply, compressors arent anywhere near this area and you can actually adjust the sound when you press on the exterior in that spot. Fan maybe, but sure why they'd tuck one in there and not make it accessible.
User avatar

United States of America
g36
Admiral
Admiral
Posts: 1937
Joined: April 7th, 2014, 6:07 pm
Vessel Info: 1997 Carver 405
Location: Soddy Daisy TN.
Has thanked: 7 times
Been thanked: 586 times

Re: knocking noise when a/c runs

Postby g36 » July 13th, 2020, 6:45 pm

yeah I agree with you on the installation of things many times doesn't make since. Good luck
1997 Carver 405
Crusader xli
The Black Pearl
Soddy Daisy Tn.

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