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Old 06-30-2019, 07:41 PM   #1
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CO detector beeping

Our CO detector beeps when the RV chassis battery is charged but the house batteries are disconnected or not charged.

We have to disconnect the chassis battery to make it stop.

Any ideas on the cause of this?
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Old 06-30-2019, 07:45 PM   #2
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Where does your unit get it's power from? If you read the instructions on these things, they say they will sound if low power is delivered.
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Old 06-30-2019, 07:55 PM   #3
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We have 2 house batteries, and when all batteries are charged or we are plugged into electric power there is no beeping.

We are also having trouble keeping the chassis battery charged, something keeps draining it down, could the CO detector be problem. Maybe replace it.
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Old 06-30-2019, 08:52 PM   #4
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Mine sounds when the house batteries are low.
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Old 07-01-2019, 08:59 PM   #5
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You don't have a CO detector problem, you have a problem with something draining your batteries. Disconnect the CO detector and see if the batteries still drain.
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Old 08-21-2019, 12:12 AM   #6
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Our 93 fleetwood had a co2 detector that beeped fast then slow then quiet to indicate the gas was flowing properly. I forgot to turn it on the first time out and though my propane was full, I had no gas and no hot water. Once I switched the detector on and it cycled all was ok.
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Old 08-22-2019, 09:20 AM   #7
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Even if the CO (not CO2) detector is hardwired it has a 9v backup battery, and when that gets low it beeps to remind you to replace it. If the 9v battery is dead and you disconnect the house batteries the beeping will stop, because nothing is powering it.

I don't know what coach you have but my 2010 Fleetwood Tioga 28Y chassis battery was constantly draining, often overnight, and it turned out that the unlabeled mirror heater switch on the driver side pillar was active even when the key was off. Once I discovered that and keep it off, the chassis battery stays charged for weeks.
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Old 08-22-2019, 09:27 AM   #8
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Quote:
Originally Posted by mikeh2obury View Post
Our 93 fleetwood had a co2 detector that beeped fast then slow then quiet to indicate the gas was flowing properly. I forgot to turn it on the first time out and though my propane was full, I had no gas and no hot water. Once I switched the detector on and it cycled all was ok.

The LP detector only sniffs for propane leaks. Usually located near the floor inside the coach, above the LP compartment. The CO detector only sniffs for carbon monoxide, usually on the ceiling. I don't know of any detectors that monitor the flow of LP.
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Old 08-22-2019, 09:33 AM   #9
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Check the build date. They will beep when their life is up. Usually 7 years, but have had them fail much much sooner
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Old 08-22-2019, 11:28 AM   #10
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Originally Posted by tap4154 View Post
The LP detector only sniffs for propane leaks. Usually located near the floor inside the coach, above the LP compartment. The CO detector only sniffs for carbon monoxide, usually on the ceiling. I don't know of any detectors that monitor the flow of LP.


Actually the LP detector will also respond to methane. And we all know how that gets there.
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Old 08-22-2019, 11:34 AM   #11
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The CO / propane monitors have a set life expectancy,
Usually 5- 7 years.
Yes, they will beep if low battery.
Remove detector, will have a date stamped on it...
Bacicly just replace it.
Available on Amazon or most RV supply..
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Old 08-22-2019, 11:54 AM   #12
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Actually the LP detector will also respond to methane. And we all know how that gets there.

I read a thread where the persons CO detector kept going off. They finally figured out the dog was sleeping next to it...
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Old 08-22-2019, 05:41 PM   #13
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Originally Posted by Flee2thewood View Post
We have 2 house batteries, and when all batteries are charged or we are plugged into electric power there is no beeping.

We are also having trouble keeping the chassis battery charged, something keeps draining it down, could the CO detector be problem. Maybe replace it.
I see by your profile you have a Tioga 31M. It has the same mirror heater switch my 28Y has that is hot even with the key off. That was draining my chassis battery overnight if left on. I didn't even know what it was for years because it's not marked, and the mirrors don't have the heated mirror icon. Make sure it's off and that may solve your chassis battery drain issue.

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Old 08-23-2019, 12:15 AM   #14
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Originally Posted by Flee2thewood View Post
Our CO detector beeps when the RV chassis battery is charged but the house batteries are disconnected or not charged.

We have to disconnect the chassis battery to make it stop.

Any ideas on the cause of this?
I have read that some inverters or chargers diodes can backfeed. leaving a low DC voltage on a circuit that should be dead? Cannot recall brand from the post, so not much further help, but makes sense, and recall I commented on design error, but could also be faulty diode symptom? They found theirs by pulling fuses, (I think) tracing phantom loads killing battery?
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