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I have a Utica Starfire 3 boiler, 20 +/- yo. It has a Beckett AFG burner. It had a annual service by a service tech before the heating season; vac out, new filter, nozzel, and replacement of firebox lining. Since then, I have had intermittant shutdowns of the system, mid-firing. In other words, while it's firing, the flame goes out while motor still runs. After the
time interval the red light comes on at the controller, and the unit shuts down. Thinking it's a simple ignition problem, I replaced the controller (Honeywell R8184G), transformer (Beckett 51771U), cadcell, and ignitor tips, which I set with the T-gage. Still happens 1-2 times a day. I'm stumped and feel a little funny calling service guy back after doing so much stuff myself.
Thinking about changing out the pump (A2VA-7116) today. This is getting expensive, any ideas?