Low Limit Thermodisc Switch | F110-20F / 43NF51 / 60T12 | 110°F Close / 90°F Open | Recessed Mount Snap Disc | Universal Fit for Earth Stove, Whitfield, Buck, Regency & More

Low Limit Thermodisc Switch – F110-20F (43NF51 / 60T12) | 110°F Close / 90°F Open | Recessed Mount Snap Disc | Universal Fit for Earth Stove, Whitfield, Buck, Regency & More

Maintain safe and efficient stove operation with this F110-20F Low Limit Thermodisc Switch, also known as a Proof of Fire (POF) switch. Designed to automatically engage or disengage the distribution blower based on stove temperature, this snap disc closes at 110°F to signal that the fire is lit, and reopens at 90°F to prevent cold air from circulating through the room. It’s an essential component for optimizing heat output and protecting your stove’s control system.

Compatible with a wide range of pellet, wood, and gas stoves from Earth Stove, Whitfield Traditions, Buck, and Regency, this switch is a high-quality replacement part built to meet or exceed OEM standards.

Key Features:

• Proof of Fire / Low Limit Function – Closes at 110°F to activate blower; opens at 90°F to shut it off
• Automatic Fan Control – Ensures blower only operates when stove is at proper temperature
• Snap-Disc Thermostat – Delivers fast and reliable thermal response
• Recessed or Surface Mount – Versatile fit based on stove model
• OEM-Compatible Replacement – Matches original performance in wood, pellet, and gas units
• Wide Compatibility – Trusted solution for dozens of stove models across top brands

Specifications:

• Part Numbers: F110-20F, F110-20, 43NF51, 60T12, 910-142
• Function: Low Limit / Proof of Fire snap-disc switch
• Temperature Range: Closes at 110°F, opens at 90°F
• Temperature Differential: 20°F
• Switch Action: Normally open – closes on temperature rise
• Mounting Style: Recessed or surface (varies by unit)
• Terminal Type: Spade connectors
• Application: Activates blower/fan when heat is present
• Warranty: 1-Year Manufacturer Warranty

Compatible Stove Brands & Models:

• Earth Stove (Wood & Pellet):
TP300, TP301, TP305, TP308, TP340, TP40, TP40N, TP440
FP60, MP35, MP40 (Rear Vent), MP50, MP240, MP250
MPD040T, MPD070, MPW040T, MPW070
PCH040 Patriot, PI35, RP45, RP45BP
HWS040, HWS070 Minuteman, HWF040 Aristocrat
HW040-BK, HW040-T, HW070-BK, HW070-T (Homewarmer)
BV400C, BV400C-2 Bayview (including Catalytic), NF2000, NF2000I
Note: BV400C-2 Bayview - for Serial #20153 and lower

• Whitfield Traditions Series:
WP50

• Buck Wood Stoves:
Compatible across multiple Buck stove series (check manual)

• Regency Stoves (Wood & Gas):
CS2400 Alterra, FP90, F1100, F2100, F2400M, F3100 Classic, F5100
Vancouver F2402M, EX90, R90
P33, P36, P42, P48 (gas units)

Always confirm compatibility by checking your stove’s manual or existing part number. Mounting style may vary slightly; older units may require minor fitting adjustments.

Pairs well with: Earth Stove Parts and Regency Fireplace Parts

Why Choose the F110-20F Thermodisc Snap Disc?

Engineered for automatic blower control and thermal safety, this versatile snap-disc switch enhances your stove’s efficiency and protects against premature fan operation. Whether you’re replacing a failed sensor or upgrading for seasonal maintenance, this high-quality component delivers dependable temperature regulation and OEM-grade performance.