8' MM1 HD blade, 3 wire insta-act system with Fish Stik controller mounted on a 2000 Chevy 3/4 ton. I installed this plow used in fall of 2006 and its worked perfectly since I put it on. Got about 5-6" last night so I went to plow the drive this morning, got the plow on, wires hooked up, powered on the controller and the thing wouldn't lift. I can hear the motor working (or at least the relays kicking on), the triangle on the top of the lift piston even shudders a bit...but it won't go up. Tested the angles and it only turns to the right(in other words the driver's side piston moves out), but it won't return to center. Popped it off and came into work, but I need to get it fixed ASAP or I'm stuck shoveling. I have done no diagnostics at this point, so I'm looking for suggestions. My firs tthought is air in the hydraulics so I can certainly check the fluid level when I get home, next thought is possibly a frayed wire in the controls coming from the truck, but I would tend to think that if that were the case I would not hear anything when I hit the lift button on the controller. Also considered I might have some blockage in the lines, but it seems odd that it would do both of them at the same time. Wasn't particularly cold last night...temp readout on the truck said 13 this morning, I've used it well below zero without any issues before. Resivoir is filled with ATF by the way...its my understanding that this should be ok, but that my real risk is possible reduced or no performance in extreme cold (like 20-30 below). Maybe I need to bleed it out and top off? I remember alot of peolpe telling me the coils tend to blow, but I'm not sure what the behavior is when it does...would it just shut the whole thing off or does it blow in smaller stages like the heater blower motor resistor? Thanks in advance.