521075 Suburban Furnace Gas Solenoid Valve (SF/SFQ Furnaces)

SOLENOID (SEVEN UNIV) FURN

Voltage 12 Volts DC; Compatibility Suburban Furnaces Gas Valve 161109/ 161122; Maximum 1/2 PSI 

Compatibility Suburban Furnaces Gas Valve 161109/ 161122

Universal 12V DC solenoid for Suburban gas valves 161109 and 161122

The Suburban 521075 is the OEM‑style universal gas‑valve solenoid used on Suburban SF and SFQ furnaces equipped with gas valve assemblies 161109 or 161122. This solenoid controls the opening and closing of the gas valve during ignition and shutdown. A weak, sticking, or failed solenoid can cause intermittent ignition, delayed ignition, flame drop‑out, or complete no‑heat conditions.

This solenoid is rated for 12V DC operation and maximum 1/2 PSI, matching Suburban’s furnace gas‑valve specifications.

Key Features

• OEM‑style 12‑volt DC gas‑valve solenoid

• Compatible with Suburban gas valves 161109 and 161122

• Universal fit for SF and SFQ furnace families

• Rated for maximum 1/2 PSI

• Ensures proper gas‑valve timing and safe ignition

• Direct electrical and mechanical replacement

What this solenoid does

• Opens the gas valve during the ignition sequence

• Closes the valve when the furnace cycles off

• Maintains correct gas‑flow timing with the ignition board

• Prevents delayed ignition, flame instability, and lockouts

Symptoms of a failing solenoid

• Furnace clicks but does not light

• Intermittent ignition or flame drop‑out

• Gas valve hums, buzzes, or overheats

• Furnace cycles without producing heat

• Delayed ignition “boom” or hesitation

Compatibility

• Gas valves: 161109, 161122

• Furnace families: SF, SFQ (all models using the above valves)