I have an osmolator that I have had for less than one year and for some reason it has quit working - the light will come on but the pump does not work - it has only been used in fresh RO/DI water so it is not calcium buildup - I checked the pump and there is nothing I can see stuck in the blades - is this likely the pump or are there other possible problems - all connections look good in the wiring - I have realized how great this thing is now that it is not working! - I hate having to do a few gallons of top off on my own everyday