Lennox 71W28 Gasket L99H008 the HH84AA020 furnace board serves

the HH84AA020 furnace board serves as the direct replacement for HH84AA020

and 6") to match specific line sizes and flow velocities

it is designed for standard PSC motors

Fail-Safe Reliability: Provides consistent spring return mechanical backup to prevent system damage during power failures

fitting standard 1/4 inch ports without obstructing surrounding components

Lennox 71W28 Gasket L99H008 the HH84AA020 furnace board servesAs a seasoned technician, you know that a compromised seal on a 70 90 furnace can lead to pressure switch trips and combustion inefficiency. The Lennox 71W28 Gasket is the specific OEM collector box gasket designed to restore the airtight integrity of the flue system. Specifically engineered for Lennox furnace repair, this component (also identified as part number 102515 01) ensures that exhaust gases are properly contained within the collector box