The AO Smith – Water Heater Igniter 100110355 / 9005256015 (2 Pack) includes two genuine replacement igniters designed to restore proper burner ignition in select AO Smith gas water heaters.
Full Product Specification:
- Part Type: Hot Surface Igniter
- Part Code: 100110355 / 9005256015
- Use: Gas water heater ignition
- Pack Size: 2 Igniters
Also Compatible With:
- AO Smith models FPSH-40, FPSH-50, FPST-50
- 183267, 185273-000, (100110355 replaces older code 9005256015)
What’s Included
2 × Genuine AO Smith Hot Surface Igniters (9005256015 / 100110355)
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 new and older part codes to make confirming compatibility simple.
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FAQs
Q1: Will these igniters fit my AO Smith water heater?
If your unit lists igniter 100110355 or older code 9005256015, these genuine replacement igniters are designed to fit.
Q2: Why choose the 2-pack option?
A 2-pack offers convenience for technicians and homeowners, use one now and keep a spare for future maintenance or emergency repairs.
Q3: Can I install these igniters myself?
Installation should be performed by a qualified engineer or technician, as improper installation may create safety risks.
Q4: What is the difference between 100110355 and 9005256015?
100110355 — Newer, updated code
9005256015 — Older reference code






