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Intermittent failure to start
I have a Beckett AFG burner with a Beckett transfomer and a Honeywell R7284 control unit. I have been getting intermittent ignition failure lockouts (on Honeywell display) for the past two years. Had the system serviced 12 months ago. The tech did a spark check across the transformer spring leads (strong white arc) and cleaned the nozzle and electrodes. But the problem remained. I replaced the filters myself this fall. Now to my workaround: When it locks out, I hold the reset on the controller and when I hear the relay close, I can get it to fire by slamming my hand 3-4 times on the transformer cover. This happens daily; sometimes twice a day. The transformer is 2-3 years old. I have new electrodes and the gap tool (never tried to replace or adjust them myself) but was wondering if this might be more related to getting a new transformer installed despite seeing a strong (4-inch) arc when the tech tested? Can a transformer be intermittent (broken winding) or even thermally intermittent?