FURNACE FAN LIMIT SWITCH WIRING DIAGRAM

Wire the Fan & Limit Controls on Furnaces - InspectAPedia
Wiring the Furnace Combination Fan & Limit Control using the Honeywell L4064B as an Example. This control can be wired to serve as a safety LIMIT switch on a furnace by wiring just the limit terminals on the control. When the device is used both to control a furnace fan on-and off as well as serve as a LIMIT switch, then all four terminals are
Fan Works Only on FAN-ON Fan won't run if thermostat set to
Jan 21, 2020@joedave, That sounds reasonable to me. You know the fan works because you can run it on manual. Take a look at the fan limit switch on your furnace. It's probably a standard Honeywell unit like those shown in the series. On 2021-03-22 Attached are the wiring diagram and the unit exploded view. Using Consolidated's terminology, on the