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A.O. SMITH Ignitor: Mfr Part # 100109978 - Replacement HVACR Controls, Switches & Thermostats
A.O. SMITHReplacement HVACR Controls, Switches & Thermostats

A.O. SMITH Ignitor: Mfr Part # 100109978

A.O. SMITH Replacement HVACR Controls, Switches & Thermostats. Specifications: Product Type: Igniter.

SKU 3G-OTH-78140

Brand
A.O. SMITH
Item
Ignitor: Mfr Part # 100109978
Category
Replacement HVACR Controls, Switches & Thermostats
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Technical Specifications

A.O. SMITH
Manufacturer Part Number
100109978
Product Type
Igniter

Technical Documents

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A.O. SMITH Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

A.O. SMITH Replacement HVACR Controls, Switches & Thermostats. Specifications: Product Type: Igniter.

Frequently Asked Questions

What is the A.O. Smith 100109978 ignitor used for?

The A.O. Smith 100109978 ignitor is a replacement component for gas-fired heating equipment. It generates a spark or hot surface to ignite the gas burner in commercial and residential water heaters, boilers, and furnaces. This part ensures reliable ignition in HVACR systems.

What are the specifications of the A.O. Smith 100109978 ignitor?

The A.O. Smith 100109978 is an igniter with manufacturer part number 100109978. It is classified as a replacement HVACR control, switch, or thermostat. The product type is igniter, designed for use in gas ignition systems. Always verify compatibility with your equipment model before ordering.

Where to buy the A.O. Smith 100109978 ignitor worldwide?

You can source the A.O. Smith 100109978 ignitor through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we provide this OEM-branded igniter for HVACR applications.

How to install the A.O. Smith 100109978 ignitor?

To install the A.O. Smith 100109978 ignitor, first disconnect power and gas supply. Remove the old igniter, noting its position and wiring. Insert the new ignitor, secure it with mounting screws, and reconnect wires per the manufacturer's diagram. Restore power and test for proper ignition. Consult a qualified technician if unsure.

Used in

Common applications for A.O. SMITH
Commercial furnace maintenance — A.O. Smith limit switch 100110072 for temperature control in HVACR systems
Electric heater repair — A.O. Smith heater element 100110133 for 480 V heat exchanger replacement
Boiler draft induction — A.O. Smith blower assembly 100110631 for Lochinvar equipment
Gas furnace safety — A.O. Smith blower pressure switch 100109962 for vent pressure monitoring
Residential water heater ignition — A.O. Smith pilot assembly 100109926 for burner startup
Industrial burner assembly — A.O. Smith burner assembly 100110704 for gas-fired heating systems

A.O. SMITH Products

3G Electric supplies A.O. SMITH 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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Cross-referenced by specification & description
A.O. SMITH Control Board: Mfr Part # 100109944
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A.O. SMITH Control Board: Mfr Part # 100109944
A.O. SMITH Thermostat: Mfr Part # 100110071
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A.O. SMITH Thermostat: Mfr Part # 100110071
A.O. SMITH Pilot Assembly: Mfr Part # 100109286
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A.O. SMITH Pilot Assembly: Mfr Part # 100109286
A.O. SMITH Gas Valve: 100109915 Mfr Part #
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A.O. SMITH Gas Valve: 100109915 Mfr Part #

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