BLOCKED FLUE DETECTION METHODS AND SYSTEMS

摘要

The present invention is directed at systems and methods for detecting flue blockages in an HVAC system without the addition of numerous additional sensor elements, wiring, and connections that can unduly increase the cost and possibly reduce the reliability of the HVAC system, In an illustrative embodiment of the present invention, changes in the output of a flame sensor are used to detect when a likely flue blockage exists.