Dishwasher would not run thru rinxe cycles

after hiring qualified service company to fix unit, bought timer from you per diagnosis to save $325
unplugged device removed front cover covers removed mounting screws
unplugged wire harness
removed timer,
reversed process
turned on dishwasher, same problem
new timer did not remedy problem
Discovered troubleshooting table on back side of schematic behind front cover, read problem is plugged screens in water lines.
cleaned screens problem solved. wife is happy