New Holland lx665 did not want to start after night of -30 two days ago. I blamed bio fuel although there is anti gel in the tank. I still think that was the original problem but took out the glow plugs , fuel shut off solenoid , changed the filters, bled the pump and plugged block heater in. Today it finally started and then I found that in one of the many times in and out of the cab the aux handle had been put in detent. That is just how things go around here. Check the simple things first.