Suburban RV Furnace Parts

What Suburban RV furnace parts do you carry?

We stock 39 replacement parts for Suburban RV furnaces, including circuit boards, sail switches, limit switches, blower motors, gas valves, igniters, thermostats, burner assemblies, and door kits. Coverage spans the NT, SF, and P-series furnaces, including common service items for the NT-20SEQ, NT-30SP, SF-20, SF-30, and SF-42 models. Confirm your furnace model and serial number on the data plate before ordering to make sure you get the correct fit.

How do I diagnose a Suburban RV furnace that won't ignite or stay lit?

Most Suburban ignition failures trace back to one of four parts: the sail switch (airflow not detected), the limit switch (overheat lockout), the igniter electrode (weak or no spark), or the circuit board (no call for heat or no gas valve signal). Start by confirming 12V DC at the board, then check the sail switch with the blower running. If you also need to verify shore or battery voltage, our RV electronics collection has the testing and power components to support furnace diagnostics.

Where can I find a Suburban NT-20SEQ parts list or wiring diagram?

Suburban publishes service manuals and exploded parts diagrams for each furnace model directly through Airxcel, the parent company. For the NT-20SEQ specifically, the manual covers the burner assembly, blower wheel, motor, sail switch, limit switch, gas valve, and circuit board with OEM part numbers. If you cannot locate the diagram or are unsure which version of the NT-20SEQ you have (the unit went through several revisions), text or call us at 817-984-1852 with your serial number.

Will Suburban furnace parts work with other RV heating brands?

No. Suburban and Atwood (now Dometic) furnaces use different mounting footprints, duct sizes, gas valve configurations, and 12V control logic, so parts are not cross-compatible between the two. Within the Suburban line, many internal components (sail switches, limit switches, gas valves) carry across multiple NT and SF models, but the circuit board and burner assembly are typically model-specific. For winterizing the furnace and the rest of your plumbing system before storage, see our RV winterizing kits.

Do Suburban RV furnace parts ship free?

Yes. Most Suburban furnace replacement parts (boards, switches, igniters, motors, gas valves) ship free on orders over $100. Larger assemblies or full furnace units may carry a freight charge, which is noted on the product page. Orders typically ship within 1-2 business days from in-stock inventory.