I had this problem because there was air in the line so the pump couldn't prime. I solved my issue by filling the reservoir about 1/4 full and placing it back on the machine. Then I basically lifted the reservoir up and down rapidly and saw little air bubbles coming up from the place where the water intake is in the bottom. I did this until the air bubbles stopped appearing. It creates some sort of vacuum inside the machine I think and gets the air out of the line so the pump can prime. Anyway, I then filled up the reservoir with water and turned the machine on. It finally sucked water into the internal tank much to my relief. I've read other people have had similar issues after having put their machine in storage while moving. No one tells you how they fix it though. Just thought I would share my fix-it to try in case it can help someone else. Best of luck!