Thank you Dave. Hubby will check that out this morning.. we don’t know if it is a 3 way frig. I have googled pics of both, to me, controls look like a 2 way but he thinks it is a 3 way. Any way to check? It is a two door, buttons on outside are on, off, gas, auto comes on only if gas button is pressed. There is a check light which never comes on. The frig did run when we brought it home but don’t know if it was gas or dc. Hate to sound so dumb. We both recently retired and decided to see if we would enjoy camping - reason for purchasing an older model. It is in really good shape for a 2001 coachman..