DennisT Posted July 27, 2022 Report Share Posted July 27, 2022 For those of you that are experiencing a E1 code in their Dometic refrigerator, the factory troubleshooting suggests E1 is a propane burner or gas supply problem. However there is another cause. Your DC 12v power may have a little AC ripple in it causing the E1 code to come on. This is NOT documented in Dometic troubleshooting. The way to determine if this is a problem is to shut off your refrigerator, disconnect from shore power, and turn on refrigerator to propane mode. Leave run for at least 24 hours running on only the RV battery. (Uses very little power from the battery). If it doesn't show a E1 code during this time, the code is setting only during shore power or converter operation. To fix, you install a electric filter on the wires going to or into the refrigerator. This is external to the refrigerator and does not affect warranty if any exists. It takes a CHOKE that is rated for a max 3 amps and a 10,000 uf capacitor. If you want to see what i'm talking about, search for "electronic choke" on google. I got mine from AMAZON, capacitor too. Capacitor needs to be rated for at least 25v, and the negative lead of the capacitor need to connect to the negative 12v wire to the refrigerator. Pull the outside panel off the refrigerator on the outside of the RV and locate the 12v connector that connects the refrigerator to the RV 12v power source Disconnect the 12v positive wire to the connector on the refrigerator and insert the choke in series between the 12v wire and the connection to the refrigerator. Also solder the capacitor after the choke between the choke wire and 12v negative wire in the connector going to the refrigerator. All this does is clean up the 12v feed to the refrigerator and makes it more a pure DC signal with very little ripple effect from the RV converter when it operates. After doing this, my refrigerator stopped setting the annoying E1 code completely, on shore power. I taped up the assembly after taking a photo picture. You can either use electrical tape or duct tape so it won't touch any ground and short out. Quote Link to comment Share on other sites More sharing options...
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