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qhumberd
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400 CO Detector Chirping Every Half Minute

TomPolakis
TomPolakis Member Posts: 6
edited August 2025 in Battery/Electrical & Solar
The camper has been sitting idle for quite some time. It's been on shore power from the house. The CO detector is chirping every 30 seconds or so. I removed the wood floor of the compartment above it, only to see two wires: no fuse to pull. I pulled the related 7.5A fuse from the main fuse box, but it kept chirping. How do I disable it/make it stop?

Thanks.

Tom
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Comments

  • TourDeForth
    TourDeForth Member Posts: 128
    I had a similar issue which eventually turned out to be low voltage. But the beeping was occurring in the middle of the night. I followed the pair of wires out the back of the detector until I found a Wago connector and removed the positive power lead.
    2023 T@B 320s Boondock, 2013 Toyota Tacoma TRD 4x4 2016 Toyota Tundra 1794 4x4
    John, Northern California
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  • TomPolakis
    TomPolakis Member Posts: 6
    Thanks. I am tempted to just remove or snip the positive lead as well. Note that our camper is sitting in a driveway in Phoenix, where hostile sun and summer temperatures probably are causing some outgassing inside the camper. I don't know if that might be what it is detecting.
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  • pthomas745
    pthomas745 Administrator, Moderator Posts: 4,527
    The Alarm is trying to tell you something. Low battery? End of life? Actual gas being detected?  Try this page from the RV Safe manual and see what that pattern is trying to say.
    Note the Alarm section that discusses "high voltage" and low voltage.  What battery setup do you have in the trailer?  Are the batteries failing or overheating?

    2017 Outback
    Towed by 2014 Touareg TDi
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  • TomPolakis
    TomPolakis Member Posts: 6
    Well, duh. The chirping wasn't coming from the CO detector. It was the dying 9V battery in the smoke detector. Thanks for help, anyway.
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  • pthomas745
    pthomas745 Administrator, Moderator Posts: 4,527
    Lol....thanks for the reminder! This also happens more than you think!
    2017 Outback
    Towed by 2014 Touareg TDi
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