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Old 06-13-2019, 02:51 PM   #1
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Question Propane/Co2 sensors keep alarming

I've traveled with the frig on propane since 2012. About 3 years ago on a trip to Glacier National Park, we stopped to eat and sensors were beeping, both front and back. Opening the door for several minutes aired the unit out and they quit. At every stop along the way both to and from, they were going off but never could smell anything, not even propane smell. It made no difference if the ceiling vents were open or closed...as tired that too.

The next year, also experienced the same situation, very frustrating so just disconnected them. Then I made up some soapy water and with the propane on, I checked every fitting I could find seeking a source of any possible leak or seepage. Some fittings I checked several times but never found any possible leak.

Two years ago I replaced both sensors with new ones from Camping World thinking the originals may be outdated or bad. They were close to being outdated so thought I was good to go with new ones.

Well, it didn't work out that way. First trip out, they went off again. With several trips planned, I installed switches to cut power to them when traveling. After getting to a destination, power was restored. They never alarmed when the camper was stationary while using it or when parked at home w/propane tank on. I checked the fittings and lines several more times but no leak detected.

This spring when got the camper out of winter storage and checked the function of the furnace, stove, water heater, etc. all was good. The camper sat in the driveway for about 3 weeks (it was cold) w/propane on before taking a trip last weekend. A hundred miles out, we stopped and sure as could be, the sensors were beeping and light flashing. I cut power to them When we got to the campsite, had the door open for awhile so powered them back up and all the while there, no alarm. Traveling back home with frig on as we always travel that way, when we stopped they were alarming again.

Frustrated, today I took it to a repair center. I hope they can a possible leak and eliminate it. Any other issues, I've been able to correct myself so this is a real bummer.
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Old 06-13-2019, 04:35 PM   #2
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Just called the repair center to see if the camper was 'good to go' as I dropped it off 4 1/2 hours ago for their expert & experienced RV tecs to locate/correct the problem.

I don't feel to bad now as they haven't been able to located the source causing the sensors to go off and said it would take more time. Leaving it there overnight.

Maybe tomorrow. ??
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Old 06-14-2019, 09:01 AM   #3
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Eagle, I just had the same problem. We have been in an RV park 10 days now and our CO2/LP sensor has gone off twice for a short period. I am on shore power only including my hot water heater. The only propane is to the stove. No idea what’s happening. Waiting to see what your diagnosis is!! I guess my situation is a little different, as it’s happening when I’m stationary.
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Old 06-14-2019, 09:26 AM   #4
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Eagle - Could your trailer be picking up the exhaust from your tow vehicle? Does the alarm go off if the gas is turned off at the tank?
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Old 06-14-2019, 11:11 AM   #5
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No news yet from the RV repair center and it's noon of day 2.
I am going to see if they are working on it after lunch...or on another RV.

Twinster2 ... I don't think so as it didn't do that the first couple of years we had it and always traveled with the frig running on propane.
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Old 06-14-2019, 01:32 PM   #6
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I will bet that this is at the inflow side of your stove. Did you try one of those General gas detectors (about $35 at Lowe's)? They really work, even for very slow leaks that bubbles will not reveal.

Good luck! I'm curious to see what happens (and hoping it works out well for you).
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Old 06-14-2019, 03:35 PM   #7
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UPDATE:

They called and I returned their free loaner vehicle to retrieve my camper/pickup. I had left the TV attached to the camper.

Report:
Using an electronic sniffer, checked all connections and found no propane detected inside or outside. Sensors tested and are functioning properly. Noted that other household items can set off the sensors...or a low 'house' battery.
They did find an electrical wiring issue in the junction box on the hitch by the battery which they corrected by wiring properly.
A complete camper inspection was performed as standard on all units brought in and no other issues found w/bearings/lights/brakes/tires/appliances, etc.

So, with no propane leak, not sure what could make the sensors go off.......the black water treatment? But I installed a siphon sewer vent to dispel odors like this: https://www.amazon.com/Lippert-Compo...gateway&sr=8-4 No one has ever smoked in the camper and there is no open food in the camper when traveling so I'm stumped?

A few years ago, I got tired of the sensors going off so installed a push button power disconnect switch on each of the sensors to shut them up. May have to just turn the sensors off while in-route.

OR, any suggestions?
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Old 06-14-2019, 07:11 PM   #8
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One more wild suggestion -- some folks have reported that dogs can set off those sensors. Especially large older dogs with digestive problems. (Sounds like a joke, but it's not.)
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Old 06-15-2019, 06:38 AM   #9
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Originally Posted by profdant139 View Post
One more wild suggestion -- some folks have reported that dogs can set off those sensors. Especially large older dogs with digestive problems. (Sounds like a joke, but it's not.)
Nope, no dogs, cats or any animals in this household; home or camper.

I am considering getting an electronic sniffer to use in the camper should the sensors alarm in the future.

It just bothers me not knowing why they alarm.
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Old 06-15-2019, 09:29 AM   #10
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Still think you should try one trip with gas turned off at the tank while on the road to see if you get the same result. If the theory is that it is something other than LP, the only way to confirm this is to remove LP as a option.
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