Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
July 12, 2016
Patent Application Number
12757543
Date Filed
April 9, 2010
Patent Citations Received
Patent Primary Examiner
Patent abstract
A control system for a fuel-fired appliance and methods of operating are disclosed. When an electrical characteristic of a flame detector fails to cross a threshold level during an ignition attempt and when the electrical characteristic of the flame detector changes by a predetermined amount, the control system may activate an indicator indicating a problem with the flame detector (e.g. dirty, misaligned, or otherwise unable to properly detect the flame).
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