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Open Roads Forum  >  Travel Trailers  >  General Q&A

 > Propane smell inside trailer...how to best diagnose?

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Baja Man

Inland Empire, CA

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Posted: 10/29/22 05:15pm Link  |  Quote  |  Print  |  Notify Moderator

I checked again today. The propane appears to be leaking from the line that comes from the oven pilot assembly (where control knob connects). Pic attached. I tightened it, but it did not stop the leak.

I believe there should be no propane leaking from the end of this line at any time, except when the oven knob is pushed which allows propane to flow through this line to the pilot. Is this correct?

I will now test to see when gas is turned on, is it leaking from this line when knob is NOT pushed. Sound correct?

NOTE: The line that enters the pilot burner assembly has a brass end piece (cap sleeve) with a pin hole on end. Is this to reduce the amount propane flow?

[image]

[image]


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Baja Man

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Posted: 10/29/22 06:49pm Link  |  Quote  |  Print  |  Notify Moderator

I'm now a little confused...

I pushed oven pilot knob and gas exited end of line. Sniffer went off immediately. I turned oven knob to off. I used a shop to remove residual propane gas smell.

Waited about 30 min and checked line again. No leak.

Perhaps, all along it was residual propane from when oven and burners were tested?

Perhaps the use of the push knob control for oven pilot several times (several pushes were made) cleared something that kept it from completely sealing?

Mike134

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Posted: 10/30/22 02:20pm Link  |  Quote  |  Print  |  Notify Moderator

I had a gas leak in my garage to my heater. Soapy water was no help.
found it in 5 minutes with this.

https://www.homedepot.com/p/HOME-FLEX-Electronic-Gas-Leak-Detector-11-810-001/301876827


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MFL

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Posted: 10/30/22 02:49pm Link  |  Quote  |  Print  |  Notify Moderator

It sounds like the OPs leak detector is doing a great job of sniffing. Maybe even too good of job? With detector nearly touching the source, sniffing, it may have just picked up the residual?

All is good now, I'd trust the newly installed detector, and keep that little sniffer handy when using the trailer.

Jerry





Baja Man

Inland Empire, CA

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Posted: 10/30/22 04:42pm Link  |  Quote  |  Print  |  Notify Moderator

Update:

Turned of propane. Lit burner to remove remaining propane from lines (burner lit for less than 30 secoonds). Vacuumed lower oven and upper burner area to remove any residual propane.

Traced lower brass line (pictured in previous post) up to thermostat oven control (see attached pic).


Turned propane back on.....

Checked thermostat oven control using sniffer. It went of immediately when near the control. Used soapy water and very, very small air bubbles are coming from the threads (round silver fitting behind where sniffer is placed - see pic). It appears to be leaking from this fitting's threads.

Why would the threads be leaking? Unless the fitting is closed until the brass line is attached and then it opens?

I tried to tighten the silver fitting (nut on end and also fitting itself), but it did not stop leak.

Is this thermostat oven control supposed to be closed when not in use?
Is it supposed to open when knob is turned to pilot and pushed in and/or when turned to degree setting to set oven temp?

My guess is, it is leaking internally, but the air bubbles at threads has me puzzled.

Thoughts?
Thanks


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* This post was edited 10/30/22 04:49pm by Baja Man *

opnspaces

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Posted: 10/31/22 10:58am Link  |  Quote  |  Print  |  Notify Moderator

In your picture above you have the tip of the sniffer sitting on a round silver piece. Is that silver piece a bolt blocking off a hole? Or does the copper propane line in the picture thread into the end of the silver piece?

If it's a blocking bolt I would probably try removing the bolt and using some thread sealant on it.

If the copper propane line connects to it then it sounds like the control has a very small leak. In this case I would try using some fine emery paper on the sealing surface of the copper tube and freshen it up then screw it back in making sure it goes in straight.


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Baja Man

Inland Empire, CA

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Posted: 11/01/22 03:26pm Link  |  Quote  |  Print  |  Notify Moderator

opnspaces wrote:

In your picture above you have the tip of the sniffer sitting on a round silver piece. Is that silver piece a bolt blocking off a hole? Or does the copper propane line in the picture thread into the end of the silver piece?

If it's a blocking bolt I would probably try removing the bolt and using some thread sealant on it.

If the copper propane line connects to it then it sounds like the control has a very small leak. In this case I would try using some fine emery paper on the sealing surface of the copper tube and freshen it up then screw it back in making sure it goes in straight.


The silver fitting is not a blocking bolt; the brass line connects to the end of it. I cleaned the end fitting and ensured it went in straight. Still leaking.

Thermostat control is not available...parts have been discontinued since Atwood was purchased by Dometic. Tried several well-know outfits, and they all said the same thing...not available.

Found an entire new manifold assemble with the thermostat control I need....$150!! If I replace with this, and something else goes out, I'm back to square one.

Used part was found but I will not install a used part.

I decided to replace the stove. Found a 17" Greystone that should fit. has a one year warranty.

Baja Man

Inland Empire, CA

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Posted: 11/12/22 06:59pm Link  |  Quote  |  Print  |  Notify Moderator

The solution....

Replaced stove/oven with a new Greystone 17" unit. Fit was great and fit and finish of the unit is very good. All connections were checked with sniffer and soap/water. No leaks. This unit is a nice upgrade over previous...with lighted oven and knobs; cast grate; folding glass counter over grate; and spark igniter for stove burners and oven burner (previous did not have spark lighter for oven burner).

We'll see how well she performs on our next week long trip which is in a couple of weeks.

Thanks for all the assistance and guidance!

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