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Old 04-12-2013, 07:20 AM   #1
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Propane appliances not working

so I finally got the propane lines hooked up to the fridge, furnace, and water heater. here is what is happening

the fridge when I light the flame the it ignites below the bend where the burner tube vent holes are? this cannot be good?

the furnace the pilot will light but when it tries to kick on there is a loud whoomp then it goes out.

the water heater (is new atwood) ignites and stays lit but seems to have trouble staying lit. the flame stutters.

could all of this be my regulator?

1975 Airstream overlander restoration
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Old 04-12-2013, 08:07 AM   #2
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Our experience with the furnace pilot light going out when the main burner ignited was solved by decreasing the size of the pilot light flame. Strange as that seems, it was found in the Suburban owner's manual, and it works.

There is an adjustment screw for the pilot light orifice where the gas line for the pilot goes into the side of the furnace, on our model. Don't know if yours is the same.

Good luck.
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Old 04-12-2013, 08:30 AM   #3
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It COULD be the regulator, though I think you may have an additional problem with the refrigerator pilot.

Check to see if your gas pressure at your appliances is around 11 inches of water, and if the regulator maintains that if you try to run more than one appliance. The regulator that was installed on my trailer when I bought it was less than 5 years old, but barely supplied 9" of pressure when no appliances were running. The refrigerator wouldn't stay lit and the water heater was very sensitive to blowing out. A new regulator was enough to solve my problems.

You should also check the condition of the lines and make sure you don't have a major line that's "pinched". I'm told that over time the ethyl mercaptan odorizer added to propane can build up in the low point of lines and restrict the flow, but I have not experienced that.
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Old 04-12-2013, 10:57 AM   #4
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Like DKB_SATX, I think you may have a regulator problem. 11" of water pressure is needed to make things run properly and regulators get tired. Crushed lines are also a possibility, especially around the tongue frame where they are often routed. I have found condensed odorizer in lines, but not enough to restrict flow, however it sure is stinky if it drips out on your shoes. I tossed them.
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Old 04-13-2013, 05:55 AM   #5
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all the lines are new but what do you use to test the pressure?
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Old 04-13-2013, 06:04 AM   #6
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Quote:
Originally Posted by dkrukosky View Post
all the lines are new but what do you use to test the pressure?
You would use a manometer:
Manometers - Pressure and Vacuum Measuring - Grainger Industrial Supply
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Old 04-13-2013, 09:17 AM   #7
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Sounds like a propane line pressure issue with not enough volume getting shared. In addition to the regulator, check all the fittings as there might be an undersized short run of tubing in the system.
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Old 04-13-2013, 09:30 AM   #8
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I just ran all new lines. I have a 5/8 main line and each appliance has its own 3/8 branch of of that. I think that I will get a new regulator.
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Old 04-13-2013, 08:41 PM   #9
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My trailer has a small section of rubber hose between the regulator and the copper pipe that goes to the trailer. That hose had swollen from years of exposure to oil residue left over from propane compressors. That oil cause the hose to swell shut and would not allow propane to flow. The oil is not from the smelly stuff in the gas like most folks think.

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Old 07-31-2013, 11:42 AM   #10
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sorry to bring up an old post but I never did get these problems resolved. I replaced all the copper lines but I did use the old T fittings. I used new shut off valves at each appliance. I also installed a new regulator and hose between it and the copper. the tanks are new. The only propane item that works is the stove burners. The water heater is brand new and wont light. the fridge burns in the wrong place and the furnace blows out as soon as it lights with a loud whoomp (that scares the poo right out of me). how long would it take for the air to get out of the system?
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Old 08-01-2013, 07:06 AM   #11
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If you turn on more than one burner on the stove does the other burner flame go down? If it does then you have a flow problem not a pressure problem. Does your trailer have rubber hoses coming out of the regulator? If it does, I expect that is your problem.

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