525010 Suburban GASKET, BURNER ACCESS SF

Replaces: 070811 

OEM gasket for Suburban SF‑series burner access panels

SF-20/25/30/35 42 SF-20/25/30/35 42F, SH35 42, SH35 42F, SHD2542 SF-20/25/30/35 42 SF-20/25/30/35 42F, SH35 42, SH35 42F, SHD2542
(ABOVE SERIAL NO. 094101431)

This gasket seals the burner access plate on Suburban SF‑series furnaces. That plate must remain airtight to maintain proper combustion airflow, prevent exhaust recirculation, and ensure stable ignition. Any time the burner assembly is serviced, cleaned, or removed, Suburban specifies replacing this gasket to maintain a proper seal.

The 525010 is the current replacement for older part 070811, which appears in legacy service manuals and parts lists.

What this gasket does

• Seals the burner access door to the combustion housing

• Prevents air leaks that cause ignition failures or flame instability

• Maintains correct combustion‑air pressure and flow

• Reduces noise and vibration from loose or hardened gaskets

• Ensures safe, efficient furnace operation after burner service

When technicians replace this gasket

• During burner cleaning or removal

• When correcting ignition lockouts caused by air leakage

• When the existing gasket is brittle, cracked, or heat‑damaged

• After replacing electrodes, burners, or combustion‑chamber components

• Any time the access plate is removed for diagnostics