Name: Supco FLS700 Flame Sensor 025-27773-700
Brand: Supco
SKU: FLS700
Price: 22.64 USD
Availability: InStock

Supco FLS700 Flame Sensor 025-27773-700

Description

Product Summary

The Supco FLS700 Flame Sensor 025-27773-700 is a professional-grade replacement part from Supco (Sealed Unit Parts Co.), a trusted name in HVAC/R and appliance parts since 1945. SUPCO® flame sensors can replace many of the popular sensors in today's furnaces that use hot surface or direct spark ignition systems.

Hot surface igniters and flame sensors are the heart of modern gas furnace ignition. A cracked or weak igniter causes no-heat calls and lockouts, while a dirty or failing flame sensor causes the burners to shut down seconds after lighting. Match the igniter material (silicon carbide or silicon nitride), voltage, and mounting style to the original.

Key Features

Alumina ceramic insulator
For Hot Surface Ignition (HSI) systems
Kanthal flame rod material can withstand 1800°F
Mount on multiple burners, or adjacent to igniter
See Product Sheet F587 in Downloads section for additional X-refs
Use with spark ignition and flame sensing
WARNING: Prop 65 info

Specifications

Brand	Supco
Part Number	FLS700
Part Type	Igniter / Flame Sensor
Length (Flange to Tip)	4"
Termination	.25" Quick Disconnect

Cross Reference

The Supco FLS700 is a direct replacement for the following OEM and competitor part numbers. Always verify ratings and fit against the original part before installing.

Replaces Part #	Manufacturer	Description
025-27773-700	York®

Ideal Applications

Gas furnaces
Boilers and gas appliances with hot surface ignition

White Paper

Supco FLS700 Product Specification Sheet (PDF)

What's Included

(1) Supco FLS700 Flame Sensor 025-27773-700

Safety: Always disconnect power and follow lockout/tagout procedures before servicing electrical components. Installation should be performed by a qualified technician.

Extra Information

Find your comfort-ready size with confidence

Get a fast, learning-friendly estimate for tons and BTUs, then review it with a Pro to dial in the perfect fit for your home.

Quick sizing snapshot

Enter your home size and a few basics to see a quick HVAC365 sizing snapshot you can review with a Professional.

Home size (sq ft)

Enter at least 100 sq ft.

Use conditioned square footage only; skip garages and unfinished basements.

Climate

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Home type

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Shared walls and insulation levels change the load—pick what matches your structure.

System type

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Match the system to your ductwork, fuel, or preferred heat source for best comfort.

This is a sizing estimate for general guidance only. Always confirm final size, duct design, and fuel type with a Professional before purchasing equipment or pulling permits.

Brand:

Supco

Weight:

1.00 LBS

Safety Information:

⚠ WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Prop 65 Warning:

Yes

Part Type:

Igniter / Flame Sensor

Length (Flange to Tip):

Termination:

.25" Quick Disconnect

Replaces:

025-27773-700

Please Note: To validate the manufacturer's warranty, equipment must be installed by a qualified licensed professional in accordance with local codes and the manufacturer's installation requirements.