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Old 07-19-2017, 02:42 PM   #1
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Propane detector false alarms

I am pretty confident I dont have a propane leak but my alarm keeps going off. Are there any reasons why it would false alarm?

This is on my parents 2017 Forester class C 3011DS
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Old 07-19-2017, 02:47 PM   #2
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Are you using any aerosol products/cans in the trailer. In our old Sandstorm, anytime my wife would use her hairspray, it would set the propane alarm off. Also, are the batteries getting low? That will do it to.

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Old 07-19-2017, 02:49 PM   #3
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Lots of reasons.

Low battery
Most all spray cans
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Old 07-19-2017, 03:21 PM   #4
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Even non-aerosol cleaners of some sorts set mine off.
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Old 07-19-2017, 03:30 PM   #5
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We have had the generator on going down the road so the batteries should be good. When we stop we shut off the generator and lock up the rig and at some point while we are doing stuff the alarm goes off.
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Old 07-20-2017, 12:10 PM   #6
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We are having the same problem with our Coachmen Freelander 21QB. It has been going off while we are driving down the road. Husband will open the cab windows and the alarm will reset. Alarm has not been going off while we are parked.
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Old 07-20-2017, 12:32 PM   #7
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Check the flashing light. It will tell you what the error is. My goes off occasionally with a low battery. My battery was fine but when I measured the voltage at the sensor it as 10 v. I pulled breakers to find out what was on the circuit. Turned out my refrigerator was on the same circuit and occasionally the fans draw too much current and set off the sensor. The users manual for the propane sensor says no other items should be on the circuit, but I guess the trailer manufacturers do not read the manuals.
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Old 07-20-2017, 12:50 PM   #8
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Another thought....

Question...
Did you recently fill your propane tank?

The reason I ask is on a recent outing I had our tank filled as I entered a park to stay at.
(We we're going to be there for 3 nights and it was cold, and I was under 1/4 tank).
Later that evening the detector began going off.
I checked power, the connections, dust, everything I could think of.

Finally as my wife was concerned and I COULD smell propane, I turned the propane valve off and the alarm finally stopped.

It got below feeezing that night!

Next morning I turned the valve on, and before I called someone to come check it out, I went over my "checks" once more.

No more smell, no more alarm going off!

I figured when the tank was being filled the "blow-off" had become trapped under the coach.
And as the alarm is just above the steps, (that can be removed), and don't have a great airtight seal, that's where the propane leaked in and set off the alarm.

During the night, the propane that was trapped underneath must have dissipated.

Note to self: always fill the tank when you leave a park.

That way the air moving under the coach as you drive will move the propane away and not set off the alarm!

Just a thought!!
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Old 07-20-2017, 04:45 PM   #9
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How old is the alarm? I think they only last like five years and then need to be replaced. Also, along with the mention of aerosol cans, do you happen to gave a dog? Sounds strange, but a dog farting will set the alarm off.
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Old 07-20-2017, 05:23 PM   #10
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Had mine go off in a traffic jam!
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Old 07-20-2017, 05:41 PM   #11
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Remember it is also CO alarm. If you were in traffic and had outside air circulating from all the vehicles around you, it is possible the CO concentration reached a high enough level to set it off.
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Old 07-20-2017, 05:44 PM   #12
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Remember it is also CO alarm. If you were in traffic and had outside air circulating from all the vehicles around you, it is possible the CO concentration reached a high enough level to set it off.
Yep! Just an example what can set it off.
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Old 07-20-2017, 09:36 PM   #13
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Ours goes off when my wife used aerosol hairspray. I made her take that blasted garbage outside. She now uses a spritz sprayer and gets the same results. No more ear-splitting alarm shrieks!!!
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Old 07-20-2017, 11:41 PM   #14
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Ours went off when we were parked near a stagnant lake that had a lot of algae growing in it and giving off foul smells, so we moved. I suspect it was methane, which isn't much different than propane.
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Old 07-21-2017, 05:46 AM   #15
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How old is the alarm? I think they only last like five years and then need to be replaced. Also, along with the mention of aerosol cans, do you happen to gave a dog? Sounds strange, but a dog farting will set the alarm off.
X2 the manufacture date is on the rear and it is only good for 5 years from that date. It will give chirping sounds intermittently til it is changed.
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Old 07-21-2017, 05:50 AM   #16
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With our triple-digit temperatures here in Texas ours will sometimes go off sitting in our driveway attached to shore power but no A/C running. We leave windows opens and the Fantastic Fans running for circulation yet it still gets VERY hot inside - especially upstairs in the bedroom where this model has the Propane/CO detector.
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Old 07-21-2017, 09:14 AM   #17
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Originally Posted by 27FBSRV2009 View Post
I am pretty confident I dont have a propane leak but my alarm keeps going off. Are there any reasons why it would false alarm?

This is on my parents 2017 Forester class C 3011DS
I took one apart years back,,, and cleaned it with a shop vac,,,
Surprise Surprise it fixed the problem !!!
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Old 09-02-2017, 02:42 PM   #18
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We have had our Forest River Sunseeker a year and a month and it seems as if things are breaking! We are camping today and have the windows open for there is a nice breeze. We have both fans going yet the co2 alarm goes off. Even setting at home in the driveway it will go off. What is the deal and how in the world do we get to shut off?!? And Duck tape doesn't muffle the sound!
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Old 09-02-2017, 02:53 PM   #19
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How old is the alarm? I think they only last like five years and then need to be replaced. Also, along with the mention of aerosol cans, do you happen to gave a dog? Sounds strange, but a dog farting will set the alarm off.
Yep, blame the dog.

New plastic in close proximity will set it off too. Stuck a fresh garbage bag next to mine in the old TT and it set it off. Later, set up a new inflatable mattress on floor close to detector and it would go off randomly. I think the outgassing from the new plastics can set them off.
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Old 09-02-2017, 03:24 PM   #20
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Thing is we are plugged in to electricity and the batteries are 2/3's full. We have NO idea how old the alarm is; don't know what decade this alarm was made in.... hubby turned on the A/C and the alarm stopped. He turned A/C off so we could hear each & the TV, that's when the alarm went off. Makes no sense to us.
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