Suburban Sf Series SFV42FQ Parts Diagram · Exploded View › Burner Assembly

Furnace · 3 assemblies · 6 diagram sheets · 53 parts · by Andrew Strick, mobile RV technician

OEM exploded parts diagrams for the Suburban Sf Series SFV42FQ RV furnace: 3 assemblies (Exploded View › Burner Assembly, Exploded View › Cabinet Assembly, Exploded View › Combustion Chamber) and 53 manufacturer part numbers. 9 parts are marked as superseded — the description gives the replacement number to order instead.

The rating plate is on the furnace chassis — slide the unit's front panel off or look just inside the exterior access door. Suburban models (SF-30F, NT-34SP …) changed burners and boards over the years, so the serial number's date range matters as much as the model.

Exploded View › Burner Assembly

Components

18 items

1. #Furnace Manifold; For Suburban Furnace SF-20/ SF-25/ SF-30/ SF-35/ SF-42/ SFV-20/ SFV-25/ SFV-30/ SFV-35/ SFV-42; With Furnace Manifold Outlet Tube And Orifice Holder MFR # 171743
2. #SUBURBAN #50 ORIFICE MFR # 180309
3. #Furnace Gasket; Furnace Burner Access Door Gasket; Fits Suburban Furnace SF-20/ SF-25/ SF-30/ SF-35/ SF-42/ SFV-20/ SFV-25/ SFV-30/ SFV-35/ SFV-42; Also Use New Number 525031 MFR # 071263 Superseded: see description
4. #APPLIANCE COMPONENTS RV; Tinnerman U Type MFR # 121704
5. #APPLIANCE COMPONENTS RV; Plate Sec Air MFR # 063198
6. #APPLIANCE COMPONENTS RV; Screw 8-18 X 1/2 Ph Ph MFR # 121651
7. #APPLIANCE COMPONENTS RV; Plate Sec Air MFR # 062933
8. #Furnace Duct Cover Plate; Fits Suburban SF-Series Furnace MFR # 062935
9. #SUBURBAN BURNER ASSY MFR # 010799
10. #GROMMET MFR # 070963
11. #APPLIANCE COMPONENTS RV; Grommet MFR # 071020
12. #Furnace Gas Valve; For Use With Suburban Furnace SF-20/ SF-25/ SF-30/ SF-35/ SF-42 With Serial Numbers After 971303163; Also Use New Number 525044 MFR # 161122 Superseded: see description
13. #Furnace Gas Inlet Pipe; For Use With Suburban Furnaces SF35FQ/ SFV20FQ/ SF30F MFR # 171576 Superseded: see description
14. #APPLIANCE COMPONENTS RV; Gas Pipe Inlet MFR # 171574
15. #Igniter Electrode; For Suburban Furnace SF-20/ SF-25/ SF-30/ SF-35/ SF-42/ SF-20F/ SF-25F/ SF-30F/ SF-35F/ SF-42F (Above Serial Number 934701426); Without Gasket; Also Use New Number 525009 MFR # 232286 Superseded: see description
16. #Water Heater Gas Inlet Elbow; For Suburban Water Heater SW4-D; 90 Degree; 3/8 Inch; Single MFR # 525025
17. #Water Heater Gas Inlet Elbow; For Suburban Water Heater SW4-D; 90 Degree; Also Use New Number 525025 MFR # 170374 Superseded: see description
18. #WIRE CLAMP MFR # 062180

Exploded View › Cabinet Assembly

Components

11 items

1. #Furnace Adapter Plate; For Suburban Furnace SF20F/ SF25F/ SF30F/ SF35F/ SF42F; With 3 Ducts MFR # 101242
2. #Wall Thermostat; Single Stage; For Heat Control; Mechanical Readout; White Case MFR # 161154
3. #Furnace Gasket; Floor Gasket; Fits Suburban SFV Series Furnace MFR # 071195
4. #CABINET ASSEMBLY MFR # 102439
5. #Furnace Duct Cover Plate; Fits Suburban 4 Inch Duct MFR # 050733
6. #NR627947 RETAINER-PANEL-12 UPR-BLK MFR # 50715
7. #APPLIANCE COMPONENTS RV; CAB FRONT 2 DUCT MFR # 102316
8. #APPLIANCE COMPONENTS RV; BRKT CAB MTG MFR # 063516
9. #APPLIANCE COMPONENTS RV; BRKT REAR MFR # 063514
10. #DISCHARGE COVER PLATE MFR # 063517
11. #APPLIANCE COMPONENTS RV; COVER PLATE MFR # 063581

Exploded View › Combustion Chamber

Components

24 items

1. #VENT CAP MFR # 260231
2. #Furnace Intake Tube; For Suburban Furnace SF-Series; Intake Steel Tube; 3-1/2 Inch Length; With Gasket MFR # 051249
3. #Furnace Intake Tube; For Suburban Furnace SF-Series/ SH-Series; Intake Steel Tube; 2 Inch Length; With Gasket MFR # 051248
4. #Furnace Vent; For Suburban Furnace SF-Series And SFV-Series; Rain Shield MFR # 280582
5. #APPLIANCE COMPONENTS RV; SCREW 6-19 X 3/4 PH MFR # 122001
6. #APPLIANCE COMPONENTS RV; KIT CA WHEEL/SCREWS MFR # 521236
7. #GASKET, FIREWALL (COMBUSTION AIR) MFR # 072087
8. #Furnace Motor; Replacement For Suburban SF-42Q/ SF-45FQ/ SFV-42Q/ SFV-42FQ Furnaces MFR # 521232
9. #APPLIANCE COMPONENTS RV; SCREW #4-24X5/8 PH P H MFR # 121971
10. #Furnace Blower Housing; Replacement For Suburban SF-42Q/ SF-42FQ/ SFV-42Q/ SFV-42FQ Model Furnaces; Front Half; 2 Piece Housing MFR # 521238
11. #SCREW 8-18X1/2 SELF DRILL MFR # 121857
12. #BLOWER HOUSING REAR HALF MFR # 521253
13. #Furnace Low Air Flow Switch; For Suburban SF20/ 25/ 30/ 35/ 42 And SF20F/ 25F/ 30F/ 35F/ 42F Series Furnaces; Also Use New Number 525003 MFR # 233382 Superseded: see description
14. #Furnace Low Air Flow Switch; For Suburban Furnace SF-20/ SF-25/ SF-30/ SF-35/ SF-42/ SF-20F/ SF-25F/ SF-30F/ SF-35F/ SF-42F MFR # 232261
15. #Furnace Fan Switch; For All V-Series Suburban Furnaces (After Serial Number 952202951) MFR # 232351
16. #Ignition Control Circuit Board; For Suburban Furnace Models SF-20QT/ SF-25QT/ SF-30QT/ SF-35QT/ SF-42QT/ SF-20FQT/ SF-25FQT/ SF-30FQT/ SF-35FQT/ SF-42FQT/ SFV-20QT/ SFV-25QT/ SFV-30QT/ SFV-35QT/ SFV-42QT/ SFV-20FQT/ SFV-25FQT/ SFV-30FQT/ SFV-35FQT/ SFV-42FQT/ SF-20VHQT/ SF-25VHQT/ SF-30VHQT/ SF-35VHQT/ SF-20VHFQT/ SF-25VHFQT/ SF-30VHFQT/ SF-35VHFQT/ SF-T Replacement Cores; With 521099 Board And Rewiring Instructions MFR # 521314
17. #ignition Control Circuit Board; Replacement For Suburban 520741 Or 520820 Boards And Fits All Suburban 12 Volt Furnaces; Will Not Replace 24 Volt AC Boards MFR # 521099
18. #BLOWER WHEEL SFV-35/42Q MFR # 521233
19. #APPLIANCE COMPONENTS RV; Bushing MFR # 070362
20. #APPLIANCE COMPONENTS RV; BUSHING STRAIN RELIEF 1/2 MFR # 071206
21. #CHAMBER/FIREWALL ASM SFV-42FQ MFR # 021368
22. #Furnace Limit Switch; For Suburban Furnace SF-42/ SF-42F (Below Serial Numbers 921403896 And Above Serial Number 921403895)/ SDH-2542; Also Use New Number 525035 MFR # 232505 Superseded: see description
23. #Ignition Control Circuit Board; For Suburban Furnace Models With A Non-Fan Controlled Module Board: NT-16SQ/ NT-20SQ/ NT-16SEQ/ NT-20SEQ/ NT Replacement Cores/ SF-20Q/ SF-25Q/ SF-30Q/ SF-35Q/ SF-42Q/ SF-20FQ/ SF-25FQ/ SF-30FQ/ SF-35FQ/ SF-42FQ/ SFV-20Q/ SFV-25Q/ SFV-30Q/ SFV-35Q/ SFV-42Q/ SFV-20FQ/ SFV-25FQ/ SFV-30FQ/ SFV-35FQ/ SFV-42FQ/ SF-20VHQ/ SF-25VHQ/ SF-30VHQ/ SF-35VHQ/ SF-20VHFQ/ SF-25VHFQ/ SF-30VHFQ/ SF-35VHFQ/ SF Replacement Cores; Use With Time Delay Relay 521304; Also Use New Number 521313 For NT-T Series Or 521314 For SF-T Series MFR # 521303 Superseded: see description
24. #Furnace Time Delay Relay; Use With Non-Fan Controlled Circuit Board 521303; For Suburban Furnace Models SF-20Q/ SF-25Q/ SF-30Q/ SF-35Q/ SF-42Q/ SF-20FQ/ SF-25FQ/ SF-30FQ/ SF-35FQ/ SF-42FQ/ SFV-20Q/ SFV-25Q/ SFV-30Q/ SFV-35Q/ SFV-42Q/ SFV-20FQ/ SFV-25FQ/ SFV-30FQ/ SFV-35FQ/ SFV-42FQ/ SF-20VHQ/ SF-25VHQ/ SF-30VHQ/ SF-35VHQ/ SF-20VHFQ/ SF-25VHFQ/ SF-30VHFQ/ SF-35VHFQ/ SF Replacement Cores; 12 Volt DC; Also Use New Number 521313 For NT-T Series Or 521314 For SF-T Series MFR # 521304 Superseded: see description