Lennox Blower Snap Switch 140-20F (H5875 / 610049 / 3F01-140 / 20161) Automatic Reset Fan Switch
Restore precise, automatic blower control to your Lennox pellet or gas stove with this 140F blower snap switch. Also known as the White Rodgers 3F01-140, this surface-mount, low-limit switch is normally open and closes at 140F before reopening at 120Fensuring your blower activates only when needed. Featuring automatic reset and gold contacts for reliable performance, this OEM-equivalent switch is built for long life and high-cycle durability.
Key Features
Automatic reset closes at 140F and reopens at 120F for hands-free temperature control
Reliable fan operation ensures the convection blower activates only at the correct temperature
OEM-equivalent replacement direct substitute for Lennox H5875, 610049, and White Rodgers 3F01-140
High durability rated for 100,000+ cycles across resistive and inductive electrical loads
Surface-mount design includes gold contacts for stable thermal response and improved conductivity
Specifications
Part Numbers: H5875, 610049, 3F01-140, NBK-20161
Type: Snap disc switch
Mounting: Surface-mount
Reset Type: Automatic
Function: Close on rise (normally open)
Close Temperature: 140F 7F
Open Temperature: 120F 7F
Disc Size: 3/4″
Electrical Ratings:
125VAC, 15A / 250VAC, 8A resistive
120VAC, 5.8FLA / 34.8LRA
240VAC, 2.9FLA / 17.4LRA
Gold contacts: 30VDC, 1A / 120VAC, 125VA
Environmental Range: -40F to 350F
Approvals: UL, C-UL, RoHS compliant
Dielectric Strength: 1,500 VAC for 1 minute
Compatible Lennox Models
Bella
Winslow PS40, PI40
Designer I, II, III B-Vent Inserts
DVS1, DVS2
Epic
Firestar DVS1, GS2, GC2, GC3
Medina
Ravenna (33, 40, 55500, 55503)
SDVI
Teton
Vintage
Vision
Why Choose the Lennox 140-20F Snap Switch
This 140F blower switch is a vital component for maintaining safe, automatic blower operation in your Lennox heating system. Designed for performance and longevity, it offers consistent thermal control for smooth, efficient stove operation. Whether youre replacing a worn part or upgrading for reliability, this automatic reset fan switch ensures long-lasting, dependable results. Order now to restore automatic blower control to your pellet or gas stove!
