Washer machine would NOT be powered thru the Inverter Circuit, so rule that out. Do the roof AC units come on? From your description, you have a loss of 120 ac Power and 12 volt dc power to certain appliances. AC power loss appears to be 1/2 of the RV has lost. The other appliances you listed are 12 volt appliances. Please explain "when returning to RV". HOW long was the RV vacated? Do you mean it was in storage for some time and you returned? Or, you left for a few hours and returned and found these problems. Doug