Low Limit Thermodisc 80610 | 110°F Proof of Fire Snap Disc for Pellet Stoves

Low Limit Thermodisc (80610) – 110°F Proof of Fire Snap Disc for Pellet Stoves

Restore proper blower operation with this Low Limit Thermodisc (80610). Also known as a Proof of Fire (POF) switch, this snap disc closes at 110°F to signal the stove's control board that combustion has been established—activating the blower only when the stove is hot. This OEM US Stove Company part fits a wide range of Ashley, Breckwell, and USSC pellet stoves.

Note: Some older models may require an adapter plate for installation if your existing switch has mounting holes spaced more than 1" apart. This disc may appear smaller than earlier versions but is the correct replacement.

Key Features:
• 110°F Proof of Fire Function – Confirms combustion before engaging blower
• Reliable Snap Disc Design – Automatically closes on rise for safe fan control
• Compact Size – Fits modern combustion blower housings
• OEM Replacement – Matches original specifications for fit and function

Specifications:
• Part Numbers: 80610, C-E-090-22C, PP3321
• Function: Low Limit / Proof of Fire Snap Disc
• Closing Temperature: 110°F
• Mounting Dimensions: 1¼” L x 5/8” W x 13/16” H
• Mounting Hole Spacing: ~1” (adapter required for wider spacing)
• Terminals: Spade connectors
• OEM Status: Genuine US Stove replacement part

Compatible Models:
Ashley Pellet Stove:
• APC4000

Breckwell Pellet Stoves:
• P1000 Big E
• P20, P22, P23, P24
• P2000, P2700, P26, P28
• P32, P4000 Classic Cast
• SP6000 (Pre-2013)

USSC Pellet Stoves:
• 5040 Pellet Heater
• 5520

Pairs well with: Ashley Stove Parts, Breckwell Stove Parts, and US Stove Company Parts

Why Choose the 80610 Proof of Fire Thermodisc?

A faulty or incorrect Proof of Fire switch can prevent blowers from running, cause startup failures, or lead to unsafe operation. Replacing it with the OEM 80610 low limit thermodisc restores proper stove logic, ensures the blower engages only after ignition, and protects internal components. Built to factory specifications, this snap disc provides reliable performance and long service life.

Installation Instructions:

Disconnect power to the pellet stove before servicing. Ensure the stove is completely cool.

Access the combustion blower or Proof of Fire switch location according to your stove’s service manual.

Disconnect the spade terminals from the existing snap disc. Note wire positions or take a photo before removal.

Remove the mounting screws securing the old thermodisc. Carefully detach it from the mounting surface.

Clean the mounting area to ensure proper contact and accurate temperature sensing.

If required, install an adapter plate if your stove uses wider mounting hole spacing than the new thermodisc.

Position the 80610 snap disc onto the mounting surface and secure it with the original screws or approved replacements.

Reconnect the spade terminals firmly to the new thermodisc.

Restore power and start the stove. Verify that the blower engages only after the stove reaches operating temperature.

Installation tip: Always confirm the thermodisc rating. Installing a switch with the wrong temperature can cause startup issues or unsafe operation.