E12 no mixed fill
Make sure the water to both hoses are on !
If there is water then it will be a faulty Valve
Take out the 3 screw which hold the top on slide the top off. You will see the valves where the hoses connect to.
If you have a multimeter check the solenoid  for o/c.
If you have no idea what i am talking about get help from a Pro. or take the valves out and take them to the Local Repair shop! Warning ! never work on LIVE Equipment disconnect from Power Point. 
 
                
 Stan the Man
                
 January 2004