The AO Smith – Water Heater Igniter 100109355 / 1768A-21 / 9003626005 is a genuine replacement igniter designed to restore proper burner ignition in select AO Smith gas water heaters.
Full Product Specification:
- Part Type: Hot Surface Igniter
- Part Code: 100109355 / 9003626005 ( Older Part Code )
- Use: Gas water heater ignition
Also Compatible With:
- Works with water heaters that use ignition part number :184047, 195128, 195182, 195371, 900362115, 9003626005, 9003627005, 9003627115, 9004041005, 9004602215, 184047-000, 185148-000, 185486-000, 195128-000, 195371-000, 195371184047, 768A-413, 768A-21.
( Always check your existing water heater’s label or user manual to confirm the part number before ordering )
What’s Included
- 1 × AO Smith Hot Surface Igniter (100109355 / 1768A-21 / 9003626005)
Why Choose Direct Brand?
Trusted Since 2001
Direct Brand has supplied reliable heating and water heater replacement parts across the U.S. for more than two decades.
Fast Processing & Shipping (USA)
We work efficiently to get your order shipped and delivered as soon as possible.
Clear Product Code Guidance
We list both newer and older part codes to make it easier to confirm compatibility before ordering.
Multiple Secure Payment Options
Pay with Apple Pay, Google Pay, Mastercard, Visa, American Express, and Pay with Link.
FAQs
Q1: Will this igniter fit my AO Smith water heater?
If your unit lists 100109355, 1768A-21, or 9003626005, this genuine replacement is designed to fit.
Q2: Can I install this igniter myself?
Installation should be performed by a qualified engineer or technician to ensure safe and proper operation.
Q3: What is the difference between these part numbers?
100109355 — Newer part code
1768A-21 — Alternative code used in some model documentation
9003626005 — Older part code
