I'm new to this site. I'm not an HVAC professional. I need help. Can anyone tell me where I can find good reliable information (technical, statistical, other) on furnace flame sensor failure rates and the reason(s) for failures. Would the furnace manufactureres be good sources, is there a furnace manufacturers association out there I can contact, has anyone ever run across good articles on the subject? I'm open to everything. Thanks to anyone/everyone for help!