Reasons for non-functional piston?

[RyanCahoon]

Originally Posted by nickansh1

-our solenoid is functioning

How are you testing your solenoid? By pushing the manual trigger buttons or electrically? If you only tested with the buttons and not by applying a voltage directly to the solenoid, then the electrical portion of the solenoid may have failed, or the wire between the solenoid and the Spike may have broken, etc.

[FrankJ]

Some solenoids have a lock on the manual actuation button. If it is locked to the "on" position.....

[Al Skierkiewicz]

If the relief port is blocked, there is no where for the air on the opposite side of the piston to go.