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Old 11-27-2017, 01:17 AM   #1
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Default Adjust LP Gas Pressure to Refrigerator?

I am having trouble lighting the gas side of my refrigerator. I purchased and connected a pressure gauge and discovered the gas pressure is 9" of water column, whereas 11" is recommended. Is this enough of a differential to make a difference?

If so, how does one adjust the pressure? The regulator seems to be covered with a shield that is designed not to be removed, although I could if you deem it truly necessary. Even if I can access the regulator, how is the pressure setting changed? What do I turn and what direction?

In addition, I discovered that the refrigerator accidentally lit during the testing process. During the pressure testing, I turned the thermostat to the maximum cooling position per testing instructions. I accidentally pushed the piezo button while pushing the gas button and the refrigerator inadvertent lit! Before the testing, the refrigerator was turned down to only about 3.5 out of 10. It was at this 3.5 setting where I thought I was having problems, as I tried multiple times over a series of days to light the refrigerator, thinking that it somehow malfunctioned. Prior to this, I have had no problems with the refrigerator. Hence, the question, "Is it standard procedure to turn the thermostat to maximum cooling to light the gas side of the unit?" And is the lower than recommended pressure a problem?

Your thoughts will be appreciated!
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Old 11-27-2017, 12:29 PM   #2
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I recall removing a dust cap on the regulator then adjusting the screw clockwise to increase pressure. The dust caps are often blue or black.

There are only two flame settings with the older fridge in my van; normal or bypass. Bypass is like a pilot light. When the gas pressure was low the bypass flame would extinguish and therefor prevent normal mode operation when requested by the thermostat.
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Old 11-27-2017, 09:43 PM   #3
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How old is your rig? How old is your main (primary) regulator? I needed to replace mine (primary) this spring. They are only 20 bucks.
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Old 11-27-2017, 10:34 PM   #4
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Originally Posted by gklugie View Post
How old is your rig? How old is your main (primary) regulator? I needed to replace mine (primary) this spring. They are only 20 bucks.
The rig is 20 and the fridge is a bit older. I'll get around to replacing the regulator someday but it works OK now. At 11" WC the flame doesn't go out when in bypass mode.
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Old 11-28-2017, 12:38 AM   #5
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The packaging on a new regulator says it should be replaced every 10 years. The weak point is the rubber diaphragm which deteriorates. The concern is propane leakage through a cracked diaphragm causing a fire hazard. The fact that has changed it's adjustment point is reason enough to change it considering it's age.
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Old 11-28-2017, 02:09 AM   #6
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The coach body is 2004. Is it a special regulator? Are there different types or sizes? Naturally, being a camper van, the regulator is in a very inaccessible place, but replacement is probably doable. It is covered by a shield that is not designed to be removed (riveted on) so I cannot easily observe it.

Thanks for the information.
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Old 11-28-2017, 02:59 PM   #7
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If it is a 2004 Roadtrek you will have to bend over on this one. The tank has to be removed, not too difficult but better if it is empty.

Remove the propane line at the right rear corner of the van then four bolts drops it.

Replace both regulators, remove the rust and repaint the tank. The regulator is difficult to adjust, installed, but can be done if you leave the dust cover off. I did not replace the barbeque regulator. Have fun and don't blow yourself up.
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Old 06-14-2018, 11:00 PM   #8
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Quote:
Originally Posted by hbn7hj View Post
If it is a 2004 Roadtrek you will have to bend over on this one. The tank has to be removed, not too difficult but better if it is empty.

Remove the propane line at the right rear corner of the van then four bolts drops it.
so, i have a 2004 roadtrek 190 popular - and i want to replace the regulator - can someone tell me which model regulator i need to buy? i hadn't realized until just now when i checked that i cannot even see the regulator through the opening used to turn the valve on and fill the tank. so i will plan on dropping the tank as has been described but not until getting the replacement regulator.
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Old 06-15-2018, 02:57 AM   #9
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Marshall Excelsior is the original brand and still available. The camping world knockoff has a slightly different mounting bolt pattern. Get the original brand and it will bolt right on the mount. Replace the hose if it is over 10 years old.
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Old 06-23-2018, 08:36 PM   #10
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Quote:
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Marshall Excelsior is the original brand and still available. The camping world knockoff has a slightly different mounting bolt pattern. Get the original brand and it will bolt right on the mount. Replace the hose if it is over 10 years old.
So I just replaced the regulator on my 2004 Roadtrek 190P. And it was one giant PITA! Good thing I had my son helping - it definitely required his help. The one big snag we ran into was that it's not just the copper gas line that has to be disconnected, we also had the wire for the sensor in the way. And I could not see how to disconnect it. So all in all it took us a couple of hours to get it done all the time trying real hard not to stretch that sensor wiring.
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