161133 Suburban RV Furnace Gas Valve 12V DC 

SF-20/25/30/35 42 SF-20/25/30/35 42F (BELOW SERIAL NO. 921403846)

OEM fuel‑control valve for Suburban RV furnaces

The Suburban 161133 gas valve is a 12‑volt DC furnace gas valve that controls propane flow during ignition and heating cycles. It opens when the ignition board calls for heat and closes when the furnace shuts down, ensuring safe, timed fuel delivery to the burner. A failing gas valve can cause intermittent ignition, delayed ignition, flame drop‑out, or complete no‑heat conditions.

This valve is engineered to Suburban’s OEM specifications for pressure, flow rate, and electrical operation, making it the correct replacement for furnaces originally equipped with this valve.

Key Functions

• Opens to deliver propane to the burner during ignition

• Closes automatically when the furnace cycles off

• Works in sync with the ignition control board

• Maintains safe, regulated fuel flow

• Prevents delayed ignition, flame instability, and lockouts

Technical Characteristics

• Voltage: 12V DC

• Fuel: LP gas (propane)

• Pressure rating: Standard Suburban furnace spec (typically up to 1/2 PSI)

• Operation: Dual‑stage solenoid‑controlled valve

• Mounting: Direct‑fit replacement for OEM valve assemblies

When technicians replace this valve

• Furnace clicks but does not light

• Flame lights but drops out shortly after

• Delayed ignition “boom” or hesitation

• Gas valve hums, buzzes, or overheats

• Solenoid tests good but valve does not open

• Furnace cycles without producing heat

Cross‑Reference Notes

Suburban gas valves often appear in manuals under multiple part numbers depending on furnace family and production year. If you want, I can map 161133 into your gas‑valve matrix alongside 161109, 161122, and the solenoid kits 521074 and 521075 for clean cross‑linking.