Lennox 74W77 Limit Switch R-410A ensuring your defrost schedules remain

ensuring your defrost schedules remain intact during transient power loss or site maintenance

and BT1420035

Does this assembly include the sensing bulb and mounting hardware

this single-stage SPDT control provides a wide regulation range from -40°F to 212°F

Lennox 74W77 Limit Switch R-410A ensuring your defrost schedules remainThe Lennox 74W77 Limit Switch is a critical OEM safety component engineered for precise thermal regulation within Lennox furnaces and air handlers. This L155 30F limit switch is calibrated to open at 155F and automatically reset when the temperature drops by 30F, preventing heat exchanger damage and ensuring safe operational cycles. Designed as a direct Lennox 74W77 replacement, this high limit control utilizes a bimetal sensing element to monitor