Lochinvar & A.O. Smith 100112657 Blower

The Lochinvar & A.O. Smith 100112657 Blower Assembly is a critical OEM component designed for high-efficiency residential gas water heaters, specifically engineered for the PV(N/L)5065ST series. This 7-slot blower is calibrated to operate at a precise 0.99" W.C. (Water Column) static pressure, ensuring the correct air-to-fuel ratio for clean combustion and reliable venting. As a direct replacement for A.O. Smith 562408, this assembly facilitates optimal airflow modulation, which is essential for maintaining the firing rate and thermal efficiency of condensing water heaters and power-vented systems.

For technicians performing standard maintenance or emergency repairs, the 100112657 blower kit provides a seamless drop-in solution. The assembly includes a pre-wired power cord and is constructed to withstand the high-demand environments of modern hydronic and potable water heating systems. Utilizing OEM Lochinvar parts ensures that the pressure switch and control module receive accurate feedback, preventing nuisance lockouts and ensuring safe combustion air flow throughout the heating cycle.

Key Benefits

• System Compatibility: Engineered specifically for residential gas heaters including model PV(N/L)5065ST.
• Precision Calibrated: Rated at 0.99 in WC to maintain factory-spec static pressure and venting velocity.
• Enhanced Airflow: The 7-slot impeller design optimizes turbulence and mixing within the combustion chamber.
• Durable OEM Construction: Built by APCOM/A.O. Smith for long-term vibration resistance and thermal stability.
• Simplified Service: Direct replacement design reduces labor time during blower motor assembly swaps.

Common Questions

What are the symptoms of a failing 100112657 blower?
Common indicators include increased mechanical noise (bearing wear), frequent pressure switch "open" errors, or the water heater failing to initiate the pre-purge cycle. If the blower cannot reach the required RPM to overcome 0.99" W.C., the system will prevent ignition for safety.

Does this kit include the gasket and mounting hardware?
This kit typically consists of the blower assembly and power cord. It is professional best practice to inspect the mounting gasket and replace it during installation to ensure an airtight seal between the blower housing and the burner interface.

Can I use this blower on other power-vented models?
While many blowers look similar, the 100112657 is specifically calibrated for 0.99" W.C. using a 7-slot configuration. Using an incorrect blower on a power-vented system can lead to improper combustion, carbon monoxide risks, or premature component failure.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.