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enahs
Washington
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Joined: 03/11/2003
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Solved! Back to high elevation (over 6000 feet) and all appliances, including Dometic cook top working fine! Unfortunately two changes were made, so I can't say with certainty what the fix was, but here goes. First, the cook top part with the at appliance regulator was replaced. Factor replacement part, same little regulator. In addition, the main RV regulator was replaced with a Marshall 253H, which a Marshall engineer said was fine. Did a manometer check on the Marshall with stove burners and water heater running. It showed 11.5 at home (2500 feet elevation). Made no changes to that setting. Now with all at just over 6000 feet everything is fine! Clearly, Dometic was lying when they repeatedly said that the cooktop would not operate above 4500 feet and were entirely unwilling to help. Bad company. IMO both changes I made contributed to the fix. If others encounter this issue, I would first change the main regulator to a Marshall 253H. That's the easiest and least expensive thing to try. Be sure it shows at least 11.5 WC. Or, before replacing the main regulator, make sure existing regulator is consistently delivering 11.5. I bought a Yellow Jacket manometer to do the checking. Check with gas flowing, say, to the stove burners.
* This post was
edited 03/26/23 12:58pm by enahs *
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stevenal
Newport, OR, USA
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Joined: 03/16/2004
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Thanks for getting back.
Both my campers had main regulators that required adjustment when checked with a manometer. Simply unscrew the cap to find the adjustment beneath. Clockwise increases pressure.
We've camped at 10000 ft at Great Basin with all appliances working fine, although the rice stayed rather crunchy at that level.
'18 Bigfoot 1500
Torklifts and Fastguns
'17 F350 Powerstroke Supercab SRW LB 4X4
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JBarca
Radnor, Ohio, USA
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Joined: 12/16/2004
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Great news! And a good follow-up, thanks for reporting back.
Some folks reported they had no issue above 5,000 ft with their stove, but they may not have known what their main tank regulator was set at. It could be possible their main tank regulator drifted up, allowing their setup to work. The quality of standard RV regulators is not the greatest, and they can get worse when they age. I have seen this firsthand, restoring older campers.
Thanks again,
John
John & Cindy
2005 Ford F350 Super Duty, 4x4; 6.8L V10 with 4.10
CC, SB, Lariat & FX4 package
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(I wish we were camping!)
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StirCrazy
Kamloops, BC, Canada
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Joined: 07/16/2003
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enahs wrote: the main RV regulator was replaced with a Marshall 253H, which a Marshall engineer said was fine. Did a manometer check on the Marshall with stove burners and water heater running. It showed 11.5 at home (2500 feet elevation).
That's the same regulator I put in the camper 2 years ago. now the literature says it should be set for 11" WC from the factory not 11.5 so I wonder if they set them a little high on purpose. Which Manometer did you get?
When I bought mine to replace a failed one the spec, I was looking at was the BTU output as it was 350000 instead of 220000 so I figured having more volume would help prevent pressure drop better if you were running a bunch of stuff.
2014 F350 6.7 Platinum
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1991 Slumberqueen WS100
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enahs
Washington
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Joined: 03/11/2003
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Bought a Yellow Jacket manometer – not expensive. With stove burners and water heater running it showed a fat 11.5. Marshall engineer said even 12 qwould be ok but to watch for poor flame at high altitude (due to lower oxygen). He also emphasized that all regulators are affected by altitude pressure, My instinct would be to set the main regulator up a bit for higher altitudes due to lower pressure. Kids have a new Escape trailer and others owners have reported that the OE regulators supplied are all over the place. So the easy and inexpensive thing to do was replace the regulator with a highly regarded one.
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