Home > Appliances > Furnaces & Heaters >

NBK Parts 20565 Suburban SF-35 SF-42 RV Furnace Blower Motor with Gasket, 12V DC, 3-Inch Diameter
NBK Parts 20565 12V DC direct-replacement blower motor with gasket for Suburban SF-35 SF-42 RV furnace, 3-inch diameter
Suburban RV Furnace Motor With Gasket For SF Series Above 012003642 - Direct Replacement
  
List Price: $152.95
: $84.49
You save $68.46!
Part Number: 20565
Manufacturer: NBK Parts

Quantity in Stock :34

Availability: In Stock
Qty:

 
NBK Parts 12V DC Direct Replacement NBK Parts 20565 -- Suburban SF-35 / SF-42 RV Furnace Blower Motor with Gasket

If your Suburban SF-series furnace is running weak, cycling off early, or not blowing heat at all, a failed blower motor is often the culprit. This NBK Parts 20565 motor is a purpose-built direct replacement for Suburban SF-35, SF-35F, SF-42, and SF-42F furnaces, restoring full airflow and reliable ignition sequencing without modification. The gasket is included so you have everything you need for a clean, leak-free reinstall.

Restore Heat to Your Rig -- No Guesswork, No Adapters

The blower motor is the heart of your RV forced-air furnace. It pressurizes the combustion chamber, drives combustion air across the heat exchanger, and pushes warm air into your living space. When it fails, the furnace either won't light or will lock out on a sail switch fault. Replacing it with the correct OEM-spec motor gets you back to reliable heat fast.

NBK Parts (part number 20565, also listed as SKU 41-1039) engineered this motor to match the original Suburban specifications for the SF-35 and SF-42 platforms -- same 3-inch diameter, same 12V DC operation, and the same mounting footprint. No drilling, no adapter plates, no splicing unfamiliar connectors.

Direct Drop-In Fit

Matches the original mounting footprint and shaft orientation of Suburban SF-35 and SF-42 furnace motors. No modification required.

Gasket Included

Comes with one replacement motor gasket. Seals the motor-to-combustion-chamber interface for safe, efficient operation.

12V DC Operation

Runs on standard RV 12-volt house battery power. Compatible with converter-supplied DC and solar/battery systems alike.

2-Year Warranty

Backed by a limited 2-year manufacturer warranty from NBK Parts for defect-free performance.

Fitment Details -- Which Furnaces This Replaces

Correct fitment is critical with furnace motors. This motor fits the following Suburban SF-series propane furnaces:

  • Suburban SF-35 -- all units with serial numbers above 012003642
  • Suburban SF-35F -- all units with serial numbers above 012003642
  • Suburban SF-42 -- all serial numbers
  • Suburban SF-42F -- all serial numbers
Serial Number Check Required for SF-35 / SF-35F: This motor fits SF-35 and SF-35F furnaces with serial numbers above 012003642 only. Furnaces with serial numbers at or below that cutoff use a different motor. Verify your serial number on the furnace nameplate before ordering.

What is in the Box

  • 1x NBK Parts 20565 blower motor (12V DC, 3-inch diameter)
  • 1x replacement motor gasket
No Instructions Included: This is a parts-replacement item. Installation requires basic RV service knowledge -- disconnecting 12V power, removing the furnace access panel, unbolting the motor, transferring the blower wheel, and reconnecting wiring. If you are not comfortable with furnace disassembly, a certified RV technician can typically complete this repair in under an hour.

Common Failure Symptoms This Repair Addresses

  • Furnace clicks on but no ignition (sail switch not closing due to low airflow)
  • Motor hums or runs slow then furnace locks out
  • Blower wheel spins but motor gets excessively hot
  • Motor does not spin at all when furnace is called for heat
  • Loud bearing noise or grinding from the furnace cabinet
Installation Tips:
  • Disconnect shore power and turn off the battery disconnect before starting.
  • Transfer the blower wheel from the old motor to the new one -- it is not included.
  • Replace the gasket every time the motor is removed. Reusing a compressed gasket can cause combustion gas leaks.
  • After reinstall, run the furnace through two full heat cycles and verify proper ignition and airflow before closing the access panel.
Why NBK Parts? NBK Parts specializes in HVAC and appliance replacement components for the RV market, sourcing to OEM specifications. The 20565 motor is a high-volume replacement part stocked specifically for the Suburban SF-series platform -- one of the most common furnace families in towable and motorized RVs built over several decades.

Electrical Specifications

Operating Voltage12V DC
Motor Diameter3 inches
Motor TypeBrushed DC blower motor
Weight3 lbs

Fitment Reference

Fits Suburban SF-35Serial number above 012003642
Fits Suburban SF-35FSerial number above 012003642
Fits Suburban SF-42All serial numbers
Fits Suburban SF-42FAll serial numbers
Furnace Fuel TypePropane (LP)
Furnace SeriesSuburban SF Series

Part Numbers

NBK Parts Number20565
SKU / Product Code41-1039
UPC765053745222
ManufacturerNBK Parts

Warranty and Compliance

WarrantyLimited 2-year manufacturer warranty
ApplicationRV / recreational vehicle forced-air furnace
System Voltage12V DC (standard RV house power)

Package Contents

Blower Motor1x NBK 20565, 12V DC
Gasket1x motor mounting gasket
Blower WheelNot included -- transfer from original motor
Wiring HarnessNot included
InstructionsNot included
Important Information
  • For SF-35 and SF-35F furnaces, this motor is only correct for units with serial numbers above 012003642. Using the wrong motor on an earlier unit may cause improper airflow, failed ignition, or safety lockout.
  • Always disconnect 12V battery power and ensure propane is shut off before servicing your furnace.
  • Do not reuse the old gasket -- install the new gasket included with this motor to prevent combustion exhaust from entering the living space.
  • The blower wheel is not included and must be transferred from the original motor. Inspect it for cracks or debris before reinstalling.
  • This motor is designed for Suburban SF-series propane furnaces only. It is not rated for other appliances or wet/outdoor environments.
  • After installation, verify furnace ignition, airflow, and CO detector function before extended use.


Browse for more RV Accessories in the same category as this item:

Appliances > Furnaces & Heaters
Appliances