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12-27-2019, 10:35 AM
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#1
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Junior Member
Join Date: Dec 2019
Posts: 7
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Does an empty LP tank stink inside camper?
Hi, we are new to RVing.
When we run out of propane at night, we are awoken by a propane smell before it gets cold in the camper. I leave the door open to let it air out while I go outside and change the tank.
The furnace kicks back on and the smell goes away. Is this normal? I've been told empty tanks stink, but why is the smell inside the camper? None of our appliances have a pilot light that stay on. Thanks
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12-27-2019, 10:44 AM
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#2
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Senior Member
Join Date: Sep 2018
Posts: 1,944
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Just a guess, but I'm thinking when the furnace gas flow is too low to sustain a flame, and the ignitor fails to relight after some period of time, there is a time when some gas is coming through (very little) but isn't burning before the controls shut the gas valve. A little mercaptan goes a looong way toward stinking up a closed space.
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Tom & Jeri
2018 Coachmen Galleria 24T Li3
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12-27-2019, 10:57 AM
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#3
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Senior Member
Join Date: Jul 2012
Posts: 2,565
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Quote:
Originally Posted by KanzKran
Just a guess, but I'm thinking when the furnace gas flow is too low to sustain a flame, and the ignitor fails to relight after some period of time, there is a time when some gas is coming through (very little) but isn't burning before the controls shut the gas valve. A little mercaptan goes a looong way toward stinking up a closed space.
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X2!
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12-27-2019, 11:38 AM
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#4
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Senior Member
Fleetwood Owners Club Workhorse Chassis Owner
Join Date: Feb 2000
Location: San Jose, Ca, USA
Posts: 2,698
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The odorant tends to precipitate to the bottom of the tank, so as the propane level goes down the concentration of odorant gets greater. As you draw off the last of the propane you'll be getting more odorant...
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Alan Hepburn - San Jose, Ca
2007 Bounder 35E being pushed by a 2020 Jeep Gladiator Sport S or a 2022 Jeep Wrangler Unlimited (JLU) Sport S
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12-27-2019, 11:50 AM
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#5
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Senior Member
Join Date: Jan 2018
Location: Capistrano Beach, California
Posts: 4,465
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As an aside, be sure your propane detector is working and up to date. We don't know the age of your RV so this may or may not be a concern. Detectors do "wear out" and become less sensitive with age.
Depending on the location of the detector in the RV and the concentration of gas from the furnace, it's not at all clear if the detector should have sounded. Probably not if, as suspected, the odor was due to short cycling of the re-ignition sequence. In our rig, the detector is near the floor, on the wall that houses the furnace and refrigerator--very close to two major gas appliances.
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Larry, Eileen, and Finley
2004 Alpine 36FDDS
Third motor home, first Alpine, no need for another.
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12-27-2019, 12:00 PM
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#6
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Junior Member
Join Date: Dec 2019
Posts: 7
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That makes sense, but shouldn't the odor be trapped in the heat exchanger and vented to the outside?
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12-27-2019, 12:11 PM
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#7
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Senior Member
Join Date: Jul 2012
Posts: 2,565
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Just goes to show how air tight these RVs are!
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12-27-2019, 12:12 PM
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#8
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Senior Member
Join Date: Jan 2018
Location: Capistrano Beach, California
Posts: 4,465
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Quote:
Originally Posted by Harth
That makes sense, but shouldn't the odor be trapped in the heat exchanger and vented to the outside?
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Yes, it should.
Part of the difficulty in diagnosing this problem is you have not identified the type of RV. I just checked your profile and found that you have a trailer/fifth wheel. That would make me think that the location of your sleeping area relative to the tank location is playing a part in this, and possibly the tank regulator/switch-over system is where the problem lies.
If you can detail just where the tanks are and exactly from where in the RV the smell emanates, we can help pin point the problem area. Propane is heavier than air so it will not rise into the RV without directed air flow.
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Larry, Eileen, and Finley
2004 Alpine 36FDDS
Third motor home, first Alpine, no need for another.
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12-27-2019, 12:59 PM
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#9
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Junior Member
Join Date: Dec 2019
Posts: 7
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2006 38' keystone Montana
The tanks are stored in the front, underneath the sleeping area and at floor level with the rest of the trailer. Hard to tell where the smell is coming from. I've sniffed around the oven and the floor vents, but it's not any stronger in one spot.
You may be right about the switchover system not working property. If both tanks are hooked up and the valves open, and the switchover turned to the right, both tanks will run empty.
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12-27-2019, 01:36 PM
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#10
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Member
Join Date: Nov 2019
Posts: 51
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Do you have a pilot flame for the cook top or oven? You will get more odder when the tank runs out of gas.
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12-27-2019, 04:02 PM
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#11
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Junior Member
Join Date: Dec 2019
Posts: 7
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No pilot lights on the stove. Light with a match.
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12-28-2019, 07:21 AM
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#12
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Registered User
Join Date: Jun 2016
Posts: 839
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If you smell propane you should have the propane system pressure tested.
I recently purchased a sniffer and found three leaks. Two that the soapy solution didn't find.
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12-28-2019, 08:24 AM
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#13
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Senior Member
Join Date: Jan 2013
Location: Muskoka Ontario Canada
Posts: 3,142
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You should have dual tanks. If so, you shouldn't be running out of propane unless you intentionally let both tanks run out. It should have a valve that switches from the empty tank to the full one automatically. This way you can remove the empty tank to get it refilled. This way you don't lose heat, or any function of the propane system. If you don't have one of these valves with your dual tank system, you should get one. Cheers. Here is a short video explaining how it works.
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2000 coachmen santara 370 5.9 cummins isb
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12-28-2019, 08:39 AM
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#14
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Registered User
Join Date: Nov 2019
Posts: 231
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Make sure your propane 'sniffer' is close to the floor and working properly.
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