ARP valves

Anyone know how to warranty Air Ride Pro valves? I got mine from Tim just a short time ago. I've hit the switch probably 15 times and now my rear driver's dump doesn't work. I checked the wiring with a DMM, grounds good and powers fine. Seriously irritated. I took the solenoid off and it's just a slotted washer and a coil. Any suggestion?

does the solenoid make a clicking sound when you hit the switch?

Nope. I double checked all the wiring again, just to make sure. Using a test light from the power to the ground (the wires that go to the valve) tests just fine. Just no reaction from the valve. Anyone know exactly how these work?

ARP = AIM nuff said

No one really know the operation of these valves. I've read before that there are no moving parts. So, how does it work? And can anyone really explain the wear that appears at the top of the shaft near the threads? Also, does anyone know how to contact ARP directly so I can just get the coil rather than buying a whole new assembly?