I installed a new ('clear') control box 2 months ago on my 5 year old Quadrafire Castille pellet stove (the old box 'died'; confirmed by the dealer/tech). Something bad is happening with the new one now. When it powers up, it flashes the blue light 4 times,for about a minute (which is good - indication of setting for Castille model). But it also starts flashing a yellow light 3 times, continuously forever. The blower comes on immediately, and stays on (for over a 1/2 hour now). But no pellets feed. Any ideas? Thanks.