🔥 100187881 A.O. SMITH K SPARK IGNITER ASSEMBLY

🧭 Product Overview

The A.O. Smith 100187881 Spark Igniter Assembly is a factory-authorized OEM replacement designed for A.O. Smith water heaters. It provides reliable spark ignition and long-lasting performance, helping restore proper operation to your unit without wiring or burner modifications.

This complete assembly ensures dependable startup and stable flame sensing for optimal heater efficiency.

📝 Note

Replaces A.O. Smith part number 9008927015.

⚙️ Key Features

• ⚡ OEM Replacement Part: Direct-fit design for A.O. Smith water heaters.

• 🔥 Reliable Spark Ignition: Consistent spark delivery for fast, dependable ignition.

• 🧩 Complete Assembly: Includes spark igniter, gasket, and mounting screws.

• 🧱 Cover Gasket Included: Ensures a tight, heat-resistant seal to prevent leaks.

• 🔩 Screw Kit Included: Factory-size screws for a perfect fit and secure mount.

• 🛠️ Durable Construction: Built from high-quality, heat-resistant materials.

• 🧰 Easy Installation: Installs quickly with no special tools required.

⚙️ Technical Specifications

⚠️ Common Symptoms of a Faulty Igniter

• ❌ No ignition — Burner won’t light or takes too long to ignite.

• ⚡ Continuous clicking — Igniter sparks but no flame forms.

• 🔥 Weak or intermittent spark — Causes unstable ignition.

• 💡 Visible cracks or corrosion — Igniter needs replacement.

• 🚫 Flame dropout — Flame starts but quickly shuts down.

❓ Frequently Asked Questions (FAQ)

Q: Does the kit include the gasket and screws?
A: ✅ Yes — the 100187881 includes both the cover gasket and mounting screws for a complete replacement.

Q: What’s the purpose of the cover gasket?
A: 🧱 The gasket creates a tight, heat-resistant seal between the igniter base and combustion area, maintaining efficiency and safety.

Q: How do I know when to replace my igniter?
A: Replace if you see cracks, corrosion, or if your system fails to ignite properly.

Q: Is this compatible with other brands?
A: Yes — it also fits certain Lochinvar, State, and American Water Heater models that use A.O. Smith-style igniter assemblies.

Q: Should I reuse my old gasket?
A: ❌ No — always use the new gasket included with the replacement kit.

🛒 Shopping Tips

• ✅ Confirm your model and serial number before ordering.

• 🧰 Always replace the included gasket and screws when changing the igniter.

• 🔍 Check compatibility with Lochinvar, State, or American equivalents.

• ⚙️ If your heater has ignition failure or intermittent operation, this part may solve it.