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False CO alarm?

Anything related to the operation of your boat. Steering, Bilge Pumps, thru-hulls, bottom paint, etc.
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Topic author United States of America
wreckdiver
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False CO alarm?

Postby wreckdiver » July 13th, 2019, 10:31 am

Boat is '89 3607. Woke up last night in the marina to all 3 co detectors going off displaying around 55 ppm. No engines were running on the boat or around me. Any ideas on what would cause it?
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Re: False CO alarm?

Postby tomschauer » July 13th, 2019, 10:45 am

They will also alarm on low voltage?
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Re: False CO alarm?

Postby bud37 » July 13th, 2019, 11:14 am

How old are the detectors.....5 years is the life span max for CO sensors and much less if they have been subjected to very high levels of gas....say over 1000ppm.

As Tom said low voltage will alarm, also off gas from battery charging ( Hydrogen ), some cleaning supplies, but I am guessing here you were not up cleaning... :-D


Also could there have been a passing boat ?? Did the alarms stop after the boat was aired out ?

Good to always take the alarms for real as I am sure you did in this case.
The above is strictly my opinion always based on years of doing...remember to support local business , it pays back.
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Topic author United States of America
wreckdiver
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Location: Ithaca, NY

Re: False CO alarm?

Postby wreckdiver » July 13th, 2019, 11:34 am

The detectors are brand new, recent date code, and new self contained batteries. They went off in the middle of the night while we were docked at the marina and boats either side of us were unoccupied. Windows were closed and air conditioning was running.
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Topic author United States of America
wreckdiver
Scurvy Dog
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Joined: May 4th, 2018, 9:19 pm
Vessel Info: 1989 Carver 3607
Location: Ithaca, NY

Re: False CO alarm?

Postby wreckdiver » July 13th, 2019, 11:36 am

They are displaying 0 ppm now but had a peak level history at 121 ppm.
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Re: False CO alarm?

Postby bud37 » July 13th, 2019, 11:47 am

The 121 peak is a bit telling......so are you sure another boat did not go past you ? Do you have any heavy industry near your dockage, say within a mile or so, and is there a car park near your boat......may seem silly but all relevant to consider in this case.

Battery charging is also relevant, considering all three went off....same numbers on them all ??
The above is strictly my opinion always based on years of doing...remember to support local business , it pays back.
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Re: False CO alarm?

Postby Craig_B » July 15th, 2019, 9:16 am

This might sound silly but I have seen them set off by perfumes and the direct opposit -- Farts :confused:
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Re: False CO alarm?

Postby BenTen » July 15th, 2019, 11:38 am

Can I ask what brand/model you're using?
Thanks,
Ben in SC
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