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Old 08-24-2015, 09:17 PM   #1
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RM1350 Fridge - Propane Operations Frustrations

Our 2016 Lacrosse 327RES has the RM1350 fridge. Since new (March) it's been a bear to light on propane. The dealer checked it and said it was fine. I don't think it is. After taking more than 10 mins (spits and sputters as it tries) to light (even after lighting the stove burners for a few mins), I let it run for about 30 mins. Go back a few hours later, and it will not light. Click click click....poof.....click click click, repeat. I understand air in the line. However, it should not get air back in the line after 30 mins. Forget about it if I let it sit for a day. I don't know if I have a small leak or a problem with the electronic valve. The dealer checked the burner tube alignment and said it was good. Once it lights, it will stay lit until I turn it off. Once off, it's a crap shoot. I never had this problem on other trailers. Any advice, thoughts, similar experiences?

Thanks.


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Old 08-24-2015, 09:56 PM   #2
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Hmm... Im not at the cg to look, but I do think I have a gas shut-off under the fridge slide out on the frame. Something simple to check to see if its open all the way.
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Old 08-24-2015, 10:03 PM   #3
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Thanks. It does have a shutoff and it's in the open position. That valve feeds the fridge and stove. The stove and oven work fine.


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Old 08-24-2015, 10:23 PM   #4
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Have you read page 15,16 and 17 of the manual?
Forest River Forums - Downloads - Dometic RM 1350 fridge users manual
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Old 08-25-2015, 02:28 PM   #5
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Quote:
Originally Posted by Griswalds View Post
Our 2016 Lacrosse 327RES has the RM1350 fridge. Since new (March) it's been a bear to light on propane. The dealer checked it and said it was fine. I don't think it is. After taking more than 10 mins (spits and sputters as it tries) to light (even after lighting the stove burners for a few mins), I let it run for about 30 mins. Go back a few hours later, and it will not light. Click click click....poof.....click click click, repeat. I understand air in the line. However, it should not get air back in the line after 30 mins. Forget about it if I let it sit for a day. I don't know if I have a small leak or a problem with the electronic valve. The dealer checked the burner tube alignment and said it was good. Once it lights, it will stay lit until I turn it off. Once off, it's a crap shoot. I never had this problem on other trailers. Any advice, thoughts, similar experiences?

Thanks.


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Hi I don't think you have a problem with air in the gas line. I believe that the problem is a proof of ignition or flame. The electronic ignition system looks for a small mil volts that is passed through the flame to prove that the LP gas has ignited. You may have a bad electronic ignition control board or the flame is not in full contact with the ignition/flame rod causing a week signal through the flame. Spiders love to build nest around LP burners for some reason and can cause the electronics to short out through the webs.
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Old 08-25-2015, 03:04 PM   #6
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Tim's got some good advice for you. And being as I was in the heating and AC business for 40 years, let me add this. If the spitting and sputtering is happening,,,,,your gas air mixture may be too much air. The flame should be a nice quiet "roar" when it's operating right. Also your flame sensor could have a very small film of oxidation on it and that'll throw things cattywampus. Putt it out and clean it off with steel wool. Also,,,are you at a higher elevation? That'll throw your gas/air mixture out of wack.
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Old 08-25-2015, 04:52 PM   #7
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have you burned through one set of gas in the tanks yet?? if the tanks were not purged before filling, you could have air wreaking havoc with that small flame in the fridge.
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Old 08-25-2015, 06:09 PM   #8
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Thanks guys. I did burn through a tank of propane. I did some troubleshooting. I removed the burner tube cover and checked the alignment of the igniter. It's writhing spec. The burner and flu were clean. I turned on the fridge and could here gas flowing through the tube. Click click click nothing. I then used a manual lighter and it went poof, but did not stay lit. I then covered the supply line Orpheus with my finger and when I removed my finger it lit and stayed lit. Note: this is where the supply line has a gap as it enters the burner before the igniter. I turned the fridge off and then back on. Click click click nothing. I placed my finger over the outlet again and when I removed it lit and remained operational until I shut it off. It started to make me think that maybe the pressure is to high causing the flame out. When I cover the Orpheus for a second it slows down the gas and allows it to ignite. The flame is blue when lit. This is the only thing o can think of. It's definitely not air or it would not have lit and stayed lit. Thoughts, opinions, you be crazy, etc?


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Old 08-25-2015, 07:17 PM   #9
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does the ign probe have a 1/8" clearance from the burner head?? sounds like the gap is off...
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Old 08-25-2015, 07:25 PM   #10
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It does. That's the first thing I checked. Wouldn't manually lighting it confirm that it's not an alignment issue? Meaning if it flames out when manually lighting it's something else? That being said, I did check the clearance and it appears to be in spec. Thanks again.


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