null

Furnace Flame Sensors & Pilot Sensors

Furnace Flame Sensors & Pilot Sensors

Shop furnace and HVAC fuses for heating, cooling, air handler, heat pump, and control applications. Find replacement cartridge fuses, time-delay fuses, low-voltage fuses, fuse holders, and fuse blocks from brands such as Littelfuse, Bussmann, Trane, Carrier, Liebert, ABB, Mitsubishi Electric, and more. Match the amp rating, voltage rating, fuse type, physical size, and OEM part number before ordering.

  • Product
  • Qty in Cart
  • Quantity
  • Price
  • Subtotal
  • Furnace part souls images
    Add to Cart
    Quick view

    York Controls Flame Sensor, Part #S1-025-37499-000

    York - Source 1

    MSRP: $82.15
    Now: $63.48
    York Controls Flame Sensor, Part #S1-025-37499-000   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order...
    MSRP: $82.15
    Now: $63.48
    Add to Cart Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $82.15
    Now: $63.48
    Subtotal:
    Add to Cart
  • Furnace part souls images
    Add to Cart
    Quick view

    Lennox 88A12 FLAME SENSOR WIRE

    Lennox

    MSRP: $34.42
    Now: $26.60
    Lennox 88A12 FLAME SENSOR WIRE   FurnacePartSource.com Commitment ●      Item Typically Ships Within the Same Business Day ●      Brand-New Genuine Parts - Every Time
    MSRP: $34.42
    Now: $26.60
    Add to Cart Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $34.42
    Now: $26.60
    Subtotal:
    Add to Cart
  • Furnace part souls images
    Add to Cart
    Quick view

    Lennox Flame Sensor Part #51M14

    Lennox

    MSRP: $25.24
    Now: $19.51
    All our parts come with a One Year Manufacturer Warranty. Volume Purchase Discounts Available.  FurnacePartSource.com Commitment Item Typically Ships within the Same Business Day Brand-New Genuine...
    MSRP: $25.24
    Now: $19.51
    Add to Cart Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $25.24
    Now: $19.51
    Subtotal:
    Add to Cart
  • Furnace part souls images
    Add to Cart
    Quick view

    Lennox Spark Igniter / Flame Sensor, Part #84K65

    Lennox

    MSRP: $55.60
    Now: $42.97
    Lennox® Spark Igniter / Flame Sensor, Part #84K65; Backed by a One Year Warranty  FurnacePartSource.com Commitment Item Typically Ships within the Same Business Day Brand-New Genuine Parts -...
    MSRP: $55.60
    Now: $42.97
    Add to Cart Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $55.60
    Now: $42.97
    Subtotal:
    Add to Cart
  • Furnace part souls images
    Add to Cart
    Quick view

    Lennox Flame Sensor/Electrode Part #28G36

    Lennox

    MSRP: $30.72
    Now: $23.74
    Flame Sensor/Electrode; All our parts come with a One Year Manufacturer Warranty. Volume Purchase Discounts Available.   FurnacePartSource.com Commitment Item Typically Ships within the Same...
    MSRP: $30.72
    Now: $23.74
    Add to Cart Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $30.72
    Now: $23.74
    Subtotal:
    Add to Cart
  • Furnace part souls images
    Add to Cart
    Quick view

    Lennox Flame Sensor Part #20J91

    Lennox

    MSRP: $23.25
    Now: $17.96
    Lennox® Flame Sensor Part #20J91; Current part number for obsolete Lennox® # 20J9101   FurnacePartSource.com Commitment Item Typically Ships within the Same Business Day Brand-New Genuine Parts...
    MSRP: $23.25
    Now: $17.96
    Add to Cart Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $23.25
    Now: $17.96
    Subtotal:
    Add to Cart
  • Furnace part souls images
    Add to Cart
    Quick view

    Lennox Flame Sensor Part #18G89

    Lennox

    MSRP: $19.68
    Now: $15.21
    Lennox® Flame Sensor Part #18G89; Current part number for obsolete Lennox® # 18G8901   FurnacePartSource.com Commitment Item Typically Ships within the Same Business Day Brand-New Genuine Parts -...
    MSRP: $19.68
    Now: $15.21
    Add to Cart Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $19.68
    Now: $15.21
    Subtotal:
    Add to Cart
  • Furnace part souls images
    Add to Cart
    Quick view

    Lennox Flame Sensor Part #12F19

    Lennox

    MSRP: $156.95
    Now: $121.28
    Lennox® Flame Sensor Part #12F19; Current part number for obsolete Lennox® # 12F1901   FurnacePartSource.com Commitment Item Typically Ships within the Same Business Day Brand-New Genuine Parts -...
    MSRP: $156.95
    Now: $121.28
    Add to Cart Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $156.95
    Now: $121.28
    Subtotal:
    Add to Cart
  • Furnace part souls images
    Add to Cart
    Quick view

    York Controls Flame Sensor, Part #S1-025-27773-700

    York - Source 1

    MSRP: $45.51
    Now: $35.16
    York Controls® S1-025-27773-700 Flame Sensor, aka Part # 025-27773-700   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts -...
    MSRP: $45.51
    Now: $35.16
    Add to Cart Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $45.51
    Now: $35.16
    Subtotal:
    Add to Cart
  • Total: items /

Adding your products to cart

View Cart Continue Shopping

Furnace Flame Sensor Replacement Parts

A furnace flame sensor helps the heating system confirm that a burner flame is present during operation. If the sensor is worn, damaged, dirty, or no longer reading properly, the furnace may fail to complete the heating cycle or may shut down shortly after ignition. This category includes replacement furnace flame sensors, pilot sensors, flame rods, sensor leads, infrared flame heads, and flame sensor assemblies for compatible furnace, boiler, burner, and HVAC equipment.

How to Choose the Right Flame Sensor

Before ordering a replacement flame sensor, compare the product listing with the existing sensor and the equipment documentation. Important details may include the exact part number, sensor length, lead length, rod shape, mounting bracket, terminal style, ceramic body size, wiring connection, brand, and furnace or burner model. Matching by part number is the safest way to confirm the correct replacement, especially when comparing similar-looking flame rods or pilot sensor assemblies.

Universal and Brand-Specific Flame Sensors

Some listings may be brand-specific replacement flame sensors, while others may be universal flame sensor options for compatible applications. A universal furnace flame sensor should still be checked against the original part dimensions, mounting style, and equipment requirements before ordering. Visible listings may include flame sensors and pilot sensor parts from brands such as Bard, York, Rheem-Ruud, Eclipse, Honeywell, Lochinvar, Siemens Combustion, Amana-Goodman, AERCO, and Supco.

When a Flame Sensor May Need Replacement

A flame sensor may need inspection or replacement if the furnace lights briefly and then shuts off, cycles inconsistently, or shows an ignition-related fault code. These symptoms can also be caused by other furnace or ignition system issues, so the flame sensor should be diagnosed according to the equipment manual before replacing parts. For safety, furnace flame sensor replacement should be handled by a qualified HVAC technician when gas, electrical, or burner components are involved.

Confirm Fit Before Ordering

When comparing furnace flame sensor prices or looking for where to buy a flame sensor for a furnace, make sure the replacement matches the system requirements instead of choosing by appearance alone. Check the existing part label, furnace model, service manual, sensor length, lead length, mounting style, and connector type before placing your order. If the original part number is unavailable, use the product details and equipment documentation to help narrow down the correct flame sensor replacement.