How can I get the flame on my Norcold refrigerator (Model N306RM8) to stay lit?

I take it this is a refrigerator that operates on elec as well as gas, and if so then check the thermocoupling on the unit. If it runs on elec then that is about all that can go wrong.

You didn't state the Brand or Model of your refrigerator but it sounds like your flame sensor isn't working.

rv refrigerator won stay lit YouTube

Hello, First thing would be what is the make and model number of the unit? I have also found on units such as dometic and norcold there are recent manufacturer recalls due to issues with the burners. I will await till you provide the make and model number before makeing a specific solution to your issue. I await your reply and will respond to any questions you have as well.
Thank you,
Rick

The electrode that ignites the burner,also senses flame to keep burner going. Sounds like it's defective. I'd replace it, but take old one with you to match it up.

try blowing through the gas orifice with compressed air only.

u need to replace the thermocuple or be sure its near the pilot also be sure to blow out any and all dust in that area

I have the same model refrigerator in my 1999 Eurovan. Before you leave for your trip, if you haven't used the refrigerator for some time make sure it will light before you leave and run it for awhile. This will help insure it will light when you are camping. A good trick I learned is to light one of the burners on the stove for a minute before you switch the refrigerator to propane. That seems to help. Also, don't release the ignitor button on the refrigerator until 15 to 20 seconds and then do so VERY VERY SLOWLY . One other trick is set the cooling dial in a different position than the "Start" position. If that doesn't work then turn it back to the Start position. Sometimes it takes several times to get the refrigerator to light but once it is it will stay on.

Two reasons, first would be that the burner is dirty and needs cleaning. Second is that the thermocouple is either faulty or incorrectly installed. By this I mean that it might be slightly too far away from the flame to be able to conduct sufficient heat to keep the thermocouple open. This can happen when you park or drive and the rv is at different angles. So the flame does not heat the thermocouple enough and it shuts off the supply.