Hi Richard, some companies extend the normal warrantee if this device was installed by a licensed master plumber.
ISE is a great company offering fine products and they do have extended warrantees over one year
(I think up to 5 years)
What you can do is look at your service manual and you will see
a diagram of where to place this offset Allen key to unjam a simple binding.
The main thing is to leave the power off DO NOT disconnect any wires as there is no valid reason to.
Take this Allen key and go both clockwise and counter clockwise then run the water and try it again. This normally does the trick
Please keep me posted