fresh water pump

Maybe you can get with the previous poster :B

http://www.rv.net/forum/index.cfm/fuseaction/thread/tid/28892158.cfm

Curiosity question...why don't you want to put water in the tank?? Often time the coach rides better with ~1/2 tank of water.

No float/safety device in fresh water tanks to prevent pump from running

Rv Pumps are diaphragm pumps and can be run dry w/o harm

But if your are connected to 'city water' and water supply pressure is higher than pump pressure switch then pump will not try to run----no reason for it too
as they are 'on demand' pumps

But if you are not connected//no water pressure then pump should run.......wouldn't pump anything cause fresh water tank is empty (that is where pump sucks water from)
In that case:
Pump pressure switch stuck OPEN
Pump 12V DC Fuse blown
Pump controller failed (if you have several momentary on/off switches)



Question.........
WHY are you trying to run pump with fresh water tank empty in first place :H

My guess is the pump is running but you can't hear it because it's not pumping anything. My pump is nearly impossible to hear when I run out of water. Find the pump and put your hand on it. You should be able to feel it running. Be carful not to let it run dry for very long. I have never heard of a "float switch in the freshwater tank.