Electrical Repairs

Hi, I have a 2004 Alfa and I'm okay with it.  However, I ran into a problem with the refrigerator, heater and water pump and the display.  All three components stopped working.  Everything else is still operating with no problems. I checked the main breaker fuse and its okay.  Are there fuses in other location that I'm missing for those components?  Also, is there a manual water tank release valve?