- Grand California 600
When it happened to me, i simply disconnected the water pump. It is located at the top of the fresh water tank which is under the lefthand side of the bed. All you have to do is lift the mattress and the inspection cover and you will see the water tank and then you'll see (hear) the water pump and the wire connecting it. On my GC there was a connector about 40cm before the pump which I simply opened in order to isolate the pump.