Laars Heating Systems RS2105200 O-Ring 340793-762 System Reliability: Ensures consistent ignition

System Reliability: Ensures consistent ignition of the main burner across various gas pressures and manifold configurations

Common Questions: Standard Installation: "How do I install the ASCO 302-373 repair kit

and the critical J/P19 jumper harness required for proper two-stage HVAC conversion

it effectively compensates for varying head pressures

It features a high-sensitivity fan proving switch (diaphragm-style pressure switch) and a specialized electronic post-purge timer that clears combustion gases from the flue after the heating cycle ends

Laars Heating Systems RS2105200 O-Ring 340793-762 System Reliability: Ensures consistent ignitionThe Laars Heating Systems RS2105200 Venturi O Ring is a critical sealing component engineered for high efficiency condensing boilers and commercial water heaters. This OEM replacement part ensures a precise, airtight seal between the venturi and the blower assembly, which is vital for maintaining the correct air fuel ratio during combustion. Specifically designed for the Laars NeoTherm series, these o rings prevent vacuum leaks that can lead to