My Dometic RM7371 Fridge in 2005 caravan worked ok on electric and gas during 2 recent outings. Now nothing happens when turning the power selector knob to either gas or electric setting with no ignition clicking or indicator lights.

SOURCE: Dometic Caravan Fridge 7271

Your refrigerant may have completely separated in the system. Shut of the gas, disconnect the electrical and remove refrigerator from the coach or if you have sufficient room inside set it on a clean area. This operation is what is called burping the system.
1. From the base roll it onto the door and wait five minutes.
2. roll it onto the top and wait five minutes.
3. Roll it on the back and wait five minutes.
4. Return it to the base and wait five minutes.

Reinstall it or test it on electrical. It should show signs of cooling in about 30 minutes in the freezer compartment if the system is not plugged in the boiler.

SOURCE: FRIDGE WILL NOT IGNITE IN GAS MODE

The part you are looking for is the thermo couple. It senses the heat from the flame and holds the gas valve open. The clicking will try three times and then go into lock out. You then will need to reset on the front of the fridge. When installing the thermo couple do not over tighten.

SOURCE: Dometic RM2652 Refrigerator Problem

Check the flu at the back is clean

SOURCE: dometic rm2852 does not run on gas

So, the solution was simple but not obvious: the heat probe and the igniter are one and the same item, and all we had to do was bend the probe/igniter closer to the burner. After we did that the refrigerator started to behave properly.

Oddly enough, the repair manual for the refrigerator shows a igniter with a heat probe above it: the is not how the refrigerator is built.

SOURCE: Dometic 3 way RV ...the igniter strtrer just keeps

sounds like thermocouple needs replacing..easy job ? if you know what to do....