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For control of high limit and fan motor in all types of forced air heating systems.

  • Three wiring terminal options available for easy installation:
  • Push-in receptacles for stripped wire.
  • Female receptacles for 1/4 in. male flag connectors.
  • Field add-on screw terminals.
  • Controls adapt to many competitive mounting holes in replacement applications.
  • Available in a variety of fan and high limit setting ranges.
  • L4064B,W models have manual fan switch that overrides fan control to keep fan running continuously.
  • SUPER TRADELINE models with mounting adapters for easy installation and strain relief bushings to protect wiring from field abuse.
  • Application: Forced warm air heating systems
  • High Limit Temperature Range (F): 100 to 250 F
  • Fan on Range: 65 to 215 F
  • Fan off Range: 50 to 200 F
  • High Limit Stop: 200 F
  • Low Limit Stop: 100 F
  • Fan on Stop: 100 F
  • Switching Action: Fan switch makes and high limit switch breaks on temperature rise.
  • Electrical Rating(AFL): 14 A @ 120 Vac
  • Electrical Rating (AFL): 7 A @ 240 Vac
  • Electrical Rating (ALR): 84 A @ 120 Vac
  • Electrical Rating (ALR): 42 A @ 240 Vac
  • Electrical Rating Limit (AFL): 4 A @ 240 Vac
  • Electrical Rating Limit (AFL): 8 A @ 120 Vac
  • Electrical Rating Limit (ALR): 24 A @ 240 Vac
  • Electrical Rating Limit (ALR):48 A @ 120 Vac
  • Operating Temperature Range: -40 to 190 F
  • Differential Temperature: High limit 25 F
  • Maximum Ambient Temperature (F): Switch: 190F; Sensing Element: 350 F
  • Comments: Turns fan on and off according to plenum temperature. With helical bimetal sensing element. High limit stop set at 200F (93 C). With manual fan switch. Deluxe cover. Replaces L4064A,B,E.
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Fan Control
Limit Control
Temperature Range (F):
100°F to 250°F
Fan Off:
50°F to 200°F
Element Length:
Fan On:
65°F to 215°F
High Limit Stop:
Fan-Off Stop:
Fan-On Stop:
Switch Action:
Fan switch makes on temp rise
High Limit switch breaks on temp rise
Electrical Rating:
Fan (AFL): 14A @ 120 Vac
Fan (AFL): 7 A @ 240 Vac
Limit (AFL): 4 A @ 240 Vac
Limit (AFL): 8A @ 120 Vac
Pilot Duty Rating:
2A @ 24 Vac
0.25A @ 0.25 to 12 Vdc
High Limit: 25°F
Depth (Inches):
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