What is the correct size orifice needed to burn LP gas in a Coleman DGU08012UB

Don't know if you have done this but the orifice needs to be changed from natural gas to LP Gas. The holes are a different size.

they are set sizes and you need to change the air shrouds as well to get proper burn
this is a job for an accredited gas fitter so call one in and he will
have the correct jets and be able to adjust the air shrouds as well

You need parts from the manufacturer. The gas orifices are different sizes between natural gas and LP gas. If you try natural gas with an LP gas orifice, you will not get much flame. If you use LP gas with a natural gas orifice, you will burn off your eyebrows and possibly other things.

The easy answer is yes. Unfortuantely Weber no longer sells conversion kits, even to me, and I am an authorized Weber waranty service company. The only thing you can do is try and find a competant grill company in your area who has the expertise to buy the correct orifices and then the expertixe to drill them out to the correct size for LP gas. NG orifices are to large and will give you wild, uncontrollable flames if just hook the grill up to LP. LP orifices are smaller because LP gas burns hotter.

you will will have to change the reg as ng burns at 4inches and lpg burns at 14 inches and pilot orffice if fitted

First things first. Make sure you didn't simply just the tank valve on too fast, causing the excess flow valve to cut-off gas to a trickle. Close tank valve, disconnect and reconnect and then open tank valve very slowly.

If that doesn't solve the issue, seeing that you already replaced the regulator, then it's possible it wasn't converted properly. If he didn't change the orifices, leaving in the nat gas ones, then your flames would be large lazy yellow flames. If that's not the case, then it's possible he might have put in the incorrect size LP orifices based on a wrong figuring of BTU rating per burner. See if you can you find the BTU rating on the grill? How many burners are there? Does it state the BTU rating of each burner. If they are different sizes we will need to know BTU specifics for each burner, but if all are the same size, we can divide the total BTU by the # of burners for BTU rating per burner. Orifices have a # stamped on them, so see if you can read the #'s on the existing orifices. If he used the nat gas orifices and drilled them larger and installed a spud, which he redrilled for LP orifice size, then that stamped # won't matter. Something like this is a lot easier to trouble shoot in person! Using a small mirror, see what you can figure out on those orifices and we'll try to determine if they are correctly sized. Hope this helps.
Douglas

If your thermocouple is literally burning out, then have the pilot assembly checked and clean, check the orifice and the gas pressure to the pilot. Make sure the orifice size is correct for what type of fuel you are using (liquid propane or natural gas). Worst case you could have a gas valve or regulator going bad. Please have this done by a qualified service technician. I hope this helps.

Yes, it is possible.

You have to get the right orifice's for Natural gas. LP gas orifice has twice the size hole as compared to Natural Gas. Using it without the right orifice will put out way too much gas, and you will burn everything, as well as it will be a fire hazard.

Your local gas company or propane company should be able to get you the right orifice

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In most cases the pressure regulator has to be changed or adjusted. The orfices on each burner, oven, broiler and surface burner may need to be changed also. Sometimes they can be adjusted. Sometimes the threads on the pipe are different also. This is to prevent accidental connection to the wrong fuel. The big difference is the gas pressure. LP is usually around 10 - 12 lbs and natural gas is usually around 3 lbs. Properly adjusted you will like natural gas much better than LP as it is slightly hotter. The information will be in the instruction book and also on the Jenn air web site. Whirlpool owns both Maytag and Jenn aire so check all sites. The conversion kit is usually less than $50.

Are you using natural gas or propane (LP)? It sounds like you may need to change the orifice size on the gas lines going to each burner. If you are using LP and have the orifice set for Natural gas, the flames will burn higher and hotter, causing heavy soot. Under each burner, there should be a small nut with a hole in the center at the end of the gas line. The hole for Natural gas has a slightly larger diameter than one for LP. Your stove should have come with extra orifices as part of a conversion kit. Could this be the case? There's also another orifice in the main gas regulator in the back of the stove. Have you checked to see if the orifice for the regulator is set correctly? Does the oven burn hotter than usual with heavy soot, too? If you could please answer these questions first, I can give you better advice. Let me know...