Common failure points include bearing wear due to high moisture in 90+ units or restricted venting

Precise Timing Control: Manages pre-purge and post-purge cycles to protect heat exchangers and maintain airflow efficiency

Engineered for seamless integration with OEM controls

ensuring a stable magnetic field for consistent plunger actuation

For technicians servicing A-4000 series equipment

Lochinvar & A.O. Smith 100208209 Frame Runner 320734-701 Common failure points include bearingThe Lochinvar & A. O. Smith 100208209 Frame Runner is a critical structural component designed for high performance gas fired boilers and commercial water heaters. Engineered to the exact OEM specifications of Lochinvar and A. O. Smith, this frame runner provides the essential internal support and positioning required for optimal combustion chamber alignment and heat transfer efficiency. When conducting a boiler part replacement, using a genuine