This is driving me ca-razy!!!! haven't incubated in 2 years (long story) Pulled it all out and cleaned and replaced tubing. Plugged up for test run and worked great. Unplugged for 4 days waiting on eggs. NOW its not pumping water!!!! motor is working tubing is clear-I blew thru it to check. Tubing is wrapped correctly just like the picture in the manual. Got any ideas?