Not to be picky Vic, but I do believe you mean (DOF) triac , which is the door open front output and brings in the door open relay DO. DCF triac is the output to pick up the door close relay. talking about exercising the brain, I keep looking at a standard hmc100 print, and I still dont see how the door reopens, seems to me that DC, and DO will both be picked at the same time as soon as the door open limit makes and puts the 2 side of the line on terminal 36. if it is a mod operator, it should have blown the door fuse. both relays would have to be picked, since the cpu is outputting DCF to close the doors, then the door open limit makes and since DOF is shorted, DO would pick up, but, the cpu would not have any way of knowing that D0 relay was also picked, it can not tell that the DOF triac is shorted. Am I missing something here Vic,
