I have a Quadrafire Castile that will not feed pellets on start up. Has worked trouble free for 8 years. Call button is lit but auger will not turn on. Cleaned out hopper, checked snap discs for continuity. I opened the control box and the light on the board flashes continuously when I unplug/plug in the machine. Manual states it should blink in a series of 4 blinks and turn off after 60 seconds. Any ideas what to check next?