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.

🔥 Why Choose the F110-20F Thermodisc Snap Disc?

Engineered for automatic blower control and thermal safety, this versatile 120°F 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.

✅ Keep your heating system operating at peak safety and efficiency—order the F110-20F Low Limit Thermodisc Snap Disc today!