Lennox 69W90 Burner Assembly 320788-703 or humming noises during the

or humming noises during the furnace startup sequence

OEM Compatibility: Specifically designed for Johnson Controls T-4000 series vertical instruments and humidity controllers

While the RV-4 series is designed for low-pressure steam

allowing the technician to install it in any position without affecting the 1/4 turn shut-off performance or seal integrity

ensuring exact fit and alignment during field installation

Lennox 69W90 Burner Assembly 320788-703 or humming noises during theThe Lennox 69W90 Burner Assembly is a critical OEM replacement component engineered for precision combustion in compatible Lennox gas furnaces and heating units. This assembly ensures optimal fuel to air ratios, maintaining steady thermal output and reliable furnace ignition under high demand cycles. Designed for a direct fit, the 69W90 eliminates the need for field modifications, allowing for rapid installation and reduced downtime on site. When