YIGUCS 100112330 Water Heater Pilot Assembly – Replace 9007876/9007877 for Whirlpool, AO Smith, Reliance, American

Upgrade your water heater with a versatile replacement

The YIGUCS 100112330 Water Heater Pilot Assembly offers a practical, wide-range solution for common heating system issues. Designed to fit numerous popular brands, this part aims to restore reliable ignition and steady heat by renewing worn components and connectors. While results vary by unit, many users notice improved performance after a replacement when the thermocouple or related parts have worn over time.

If you’ve encountered symptoms such as an indicator light that stays on or refuses to light, or a heater that no longer heats effectively, this pilot assembly provides a straightforward route to troubleshooting and potential improvement. The kit emphasizes compatibility and durability, helping you avoid multiple individual parts shopping trips.

Key compatibility at a glance

• Whirlpool family models including several N30, N40, N50 series variants (example models listed in product materials)
• American Water Heater models in the N30/N40/N50 lines, with multiple sub-models covered
• AO Smith series (GS6-300, GCV-300, GPX-300, GVK-300, XCZ-300) and Reliance equivalents in the 630–650 range

Note: Always compare your unit’s model and serial notes with the compatibility section to confirm fit before purchasing.

What’s included and why it matters

• Replacement part codes: 100112330, 9007876, 9007877, 4067826—plus CS8840B117, 321165-002, and 100078039 as associated references
• Durable components and connectors designed to support reliable operation in typical residential water heaters
• A direct replacement option that can address common failures tied to thermocouple wear or damaged indicators

How to determine fit and use

Review the listed compatible models and cross-check against your current part codes. This pilot assembly is intended as a practical upgrade path for units using the same thermocouple and ignition assembly configuration. For best results, follow standard safety procedures when servicing gas appliances and consult your equipment manual as needed.

Real-world use possibilities

• Fast, straightforward replacement to reduce downtime when the heater is not heating as expected
• Potential improvement in ignition reliability for a more consistent hot water supply

By aligning with widely used model families, the YIGUCS pilot assembly offers a flexible option for homeowners and technicians seeking a practical upgrade without committing to a custom part.