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Thermaflow biler with Honeywell R2784 control and Beckett 21805 burner
8-year old Thermaflow boiler, Honeywell R2784 controller and Beckett 21805 burner. Ongoing problems the last 7 years. Boiler has shut down over 40 times. Each time I get a "hard lockout" message on the controller. Three different and reputable boiler companies have tried 9 times but can't fix it. New Roth upright oil tank installed and new oil lines. Boiler control has been replaced twice and the burner has been replaced once. Can anyone help?