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LENNOX Flame Sensor 20J91 - Replacement HVACR Controls, Switches & Thermostats
LENNOXReplacement HVACR Controls, Switches & Thermostats

LENNOX Flame Sensor 20J91

LENNOX Replacement HVACR Controls, Switches & Thermostats. Specifications: Product Type: Flame Sensor.

SKU 3G-OTH-85614

Brand
LENNOX
Item
Flame Sensor 20J91
Part Number
20J91
Category
Replacement HVACR Controls, Switches & Thermostats
Available to Order
Also known as:20J91LENNOX
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Technical Specifications

LENNOX
Manufacturer Part Number
20J91
Product Type
Flame Sensor

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LENNOX Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

LENNOX Replacement HVACR Controls, Switches & Thermostats. Specifications: Product Type: Flame Sensor.

Frequently Asked Questions

What is a Lennox flame sensor used for?

A Lennox flame sensor detects the presence of a flame in a gas furnace or boiler. It ensures the gas valve stays open only when a flame is present, preventing unburned gas from accumulating. This safety device is critical for residential and commercial HVAC systems.

What are the specifications of the Lennox flame sensor 20J91?

The Lennox flame sensor, manufacturer part number 20J91, is a replacement flame sensor for HVAC systems. It is designed to detect flame presence and is compatible with select Lennox gas furnaces. The product type is a flame sensor, and it is a direct replacement part.

Where to buy a Lennox flame sensor 20J91 worldwide?

You can source the Lennox flame sensor 20J91 through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide locations. Contact us for availability and lead time on this replacement part.

How to install a Lennox flame sensor?

To install a Lennox flame sensor, first disconnect power to the furnace. Remove the old sensor, typically held by one screw. Insert the new sensor with the flame-rod end positioned in the burner flame path. Reconnect power and verify the furnace ignites and runs properly.

Used in

Common applications for LENNOX
Commercial HVAC — Lennox fixed set-point air pressure switch (57W79) for monitoring airflow in rooftop units
Residential heating — Lennox digital thermostat (24Z12) for 24V AC heat and cool control in furnaces
Refrigeration — Lennox 24-inch aluminum fan blade (25W67) for condenser air movement
HVAC air handling — Lennox dual-inlet forward-curved blower wheel (85L53) for replacement in air handlers
Furnace systems — Lennox draft inducer assembly (47M55) for ensuring proper combustion airflow
Industrial ventilation — Lennox blower wheel (25W67) for air circulation in commercial HVAC equipment
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LENNOX Products

3G Electric supplies LENNOX replacement hvacr controls, switches & thermostats. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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