/
/
Parts town. Get real parts faster

Shopping Cart

Skip to NavigationSkip to Content
Loading...
Loading...
CAD
Multi-SKU Order
LoginRegister
Parts town. Get real parts faster

Find Equipment Manuals

Loading...
Loading...

Reznor B 400 Parts & Manuals

Manufacturer:

Model #:

Reznor

B 400

Unit Heater

Unit Heater

Parts Town Logo

1-Hour Pickup Available

get special offers & news from parts town

800.239.5152
Loading...
Loading...
visa
visa
mastercard
mastercard
american-express
american-express
discover
discover
paypal
paypal
© 2026 Parts Town. All rights reserved.
Loading...
visa
visa
mastercard
mastercard
american-express
american-express
discover
discover
paypal
paypal

Stock Up on Real OEM HVAC Parts for the Fall Season! SHOP NOW

Call: 800.239.5152
Hvac Parts
TECHTOWN
Track My Order

Important Update: Click here for the latest information on tariffs and their impact on our industry.

Help Desk

  • Contact Us
  • Shipping
  • Taxes And Fees
  • Returns
  • FAQ

Inside Parts Town

  • About Us
  • Careers
  • Our Difference
  • Resource Center
  • Parts Town Blog
  • techtown
  • International

Technology and Innovations

  • Parts Town App
  • Serial Number Lookup
  • Smart Manuals
  • Website Features
  • Terms of Use
  • Privacy Policy
  • Privacy Request
  1. Home
  2. /
  3. Reznor
  4. /
  5. B 400

Part Category

  • Baffles(7)
  • Bearings & Bushings(2)
  • Belts, Pulleys & Sheaves(10)
  • Brackets & Retainers(9)
  • Burners(3)
  • Capacitors(2)
  • Caps & Plugs(3)
  • Catches, Latches & Strikes(1)
  • Clamps & Clips(1)
  • Contactors(7)
  • Controls(3)
  • Conversion Kits(2)
  • Decals, Labels & Overlays(2)
  • Disconnects, Couplings & Collars(1)
  • Fan & Blower Motors(6)
  • Fan Blades & Blower Wheels(3)
  • Filters, Screens & Driers(6)
  • Fuses, Blocks & Holders(6)
  • Holders & Supports(4)
  • Hoses, Pipes & Tubing(3)
  • Ignition Modules(2)
  • Ignitors & Electrodes(1)
  • Inserts & Frames(1)
  • Nuts, Bolts & Screws(21)
  • Orifices(2)
  • Panels, Covers & Lids(15)
  • Pilot Burners(2)
  • Pumps & Motors(16)
  • Relays(10)
  • Rods, Shafts & Pins(1)
  • Shields & Guards(5)
  • Springs(1)
  • Switches & Buttons(3)
  • Terminal Blocks(2)
  • Thermocouples & Thermopiles(1)
  • Thermostats & High Limits(7)
  • Transformers(8)
  • Valves, Solenoids & Fittings(8)
  • Washers, Rings & Spacers(4)
  • Wires, Cables & Hardware(10)
Cool,Calm and Collected- Real OEM HVAC Pars Are in Season! SHOP NOW

Part Category

  • Baffles(7)
  • Bearings & Bushings(2)
  • Belts, Pulleys & Sheaves(10)
  • Brackets & Retainers(9)
  • Burners(3)
  • Capacitors(2)
  • Caps & Plugs(3)
  • Catches, Latches & Strikes(1)
  • Clamps & Clips(1)
  • Contactors(7)
  • Controls(3)
  • Conversion Kits(2)
  • Decals, Labels & Overlays(2)
  • Disconnects, Couplings & Collars(1)
  • Fan & Blower Motors(6)
  • Fan Blades & Blower Wheels(3)
  • Filters, Screens & Driers(6)
  • Fuses, Blocks & Holders(6)
  • Holders & Supports(4)
  • Hoses, Pipes & Tubing(3)
  • Ignition Modules(2)
  • Ignitors & Electrodes(1)
  • Inserts & Frames(1)
  • Nuts, Bolts & Screws(21)
  • Orifices(2)
  • Panels, Covers & Lids(15)
  • Pilot Burners(2)
  • Pumps & Motors(16)
  • Relays(10)
  • Rods, Shafts & Pins(1)
  • Shields & Guards(5)
  • Springs(1)
  • Switches & Buttons(3)
  • Terminal Blocks(2)
  • Thermocouples & Thermopiles(1)
  • Thermostats & High Limits(7)
  • Transformers(8)
  • Valves, Solenoids & Fittings(8)
  • Washers, Rings & Spacers(4)
  • Wires, Cables & Hardware(10)
Cool,Calm and Collected- Real OEM HVAC Pars Are in Season! SHOP NOW

Reznor 101643 CW3 BLR/FLT CAB 2 IN B/BE400

Reznor
  • Mfr Part # 101643
  • Parts Town # REZ101643
  • Quantity0

Obsolete, replaced by REZRZ101643

Reznor 101904 DRAFTHOOD RT SIDE 400

Reznor
  • Mfr Part # 101904
  • Parts Town # REZ101904
  • Quantity0

Obsolete, replaced by REZRZ101904

Reznor 101907 DRAFTHOOD LT SIDE 400

Reznor
  • Mfr Part # 101907
  • Parts Town # REZ101907
  • Quantity0

Obsolete, replaced by REZRZ101907

Reznor 102248 MULTIPLE HEATER CONTROLLER

Reznor
  • Mfr Part # 102248
  • Parts Town # REZ102248
  • Quantity0

Obsolete, replaced by REZRZ102248

Reznor 102291 HEAT EXCHANGER

Reznor
  • Mfr Part # 102291
  • Parts Town # REZ102291
  • Quantity0

Obsolete, replaced by REZRZ102291

Reznor 102475 INLET GUARD RI-12989AA 130-400

Reznor
  • Mfr Part # 102475
  • Parts Town # REZ102475
  • Quantity0

Obsolete, replaced by REZRZ102475

Reznor 102708 Transformer, 120 to 24 Volt, 50/60HZ, 35VA

Reznor
  • Mfr Part # 102708
  • Parts Town # REZ102708
  • Quantity0

Obsolete, replaced by REZRZ102708

Reznor 102847 FL CLR ASSEMBLY F/B400

Reznor
  • Mfr Part # 102847
  • Parts Town # REZ102847
  • Quantity0

Obsolete, replaced by REZRZ102847

Reznor 102855 BT1 COVER F/B250-400

Reznor
  • Mfr Part # 102855
  • Parts Town # REZ102855
  • Quantity0

Obsolete, replaced by REZRZ102855

Reznor 102857 FL COLLAR SUPPORT F/B250-400

Reznor
  • Mfr Part # 102857
  • Parts Town # REZ102857
  • Quantity0

Obsolete, replaced by REZRZ102857

Reznor 103054 Transformer, 120 to 24 Volt, 50/60HZ, 20VA

Reznor
  • Mfr Part # 103054
  • Parts Town # REZ103054
  • Quantity0

Obsolete, replaced by REZRZ103054

Reznor 103152 #6X1-3/4 IND HEX TYPE B SCREW

Reznor
  • Mfr Part # 103152
  • Parts Town # REZ103152
  • Quantity0

Obsolete, replaced by REZRZ103152

Reznor 103182 CAPACITOR BOOT

Reznor
  • Mfr Part # 103182
  • Parts Town # REZ103182
  • Quantity0

Obsolete, replaced by REZRZ103182

Reznor 103495 Transformer, 480 to 24 Volt, 35VA

Reznor
  • Mfr Part # 103495
  • Parts Town # REZ103495
  • Quantity0

Obsolete, replaced by REZRZ103495

Reznor 103500 Transformer, 208/240 to 24 Volt, 50/60HZ, 35VA

Reznor
  • Mfr Part # 103500
  • Parts Town # REZ103500
  • Quantity0

Obsolete, replaced by REZRZ103500

Reznor 104970 OUTER RIGHT SIDE PANEL F130

Reznor
  • Mfr Part # 104970
  • Parts Town # REZ104970
  • Quantity0

Obsolete, replaced by REZRZ104970

Reznor 104971 LT LG OUTER SIDE PANEL F130-400

Reznor
  • Mfr Part # 104971
  • Parts Town # REZ104971
  • Quantity0

Obsolete, replaced by REZRZ104971

Reznor 105476 Pulley/Sheave, Motor, 5/8" Bore

Reznor
  • Mfr Part # 105476
  • Parts Town # REZ105476
  • Quantity0

Obsolete, replaced by REZRZ105476

Reznor 112752 Limit Switch/Thermostat, Blocked Vent, L225F, Manual Reset

Reznor
  • Mfr Part # 112752
  • Parts Town # REZ112752
  • Quantity0

Obsolete, replaced by REZRZ112752

Reznor 113275 Screw, Slotted Hex Head, 10-32 x 1/2"

Reznor
  • Mfr Part # 113275
  • Parts Town # REZ113275
  • Quantity0

Obsolete, replaced by REZRZ113275

Reznor 121275 Limit Switch/Thermostat, Blocked Vent, 275F, Manual Reset

Reznor
  • Mfr Part # 121275
  • Parts Town # REZ121275
  • Quantity0

Obsolete, replaced by REZRZ121275

Reznor 131450 Thermal Cutoff/Limit Control, 306F/152C

Reznor
  • Mfr Part # 131450
  • Parts Town # REZ131450
  • Quantity0

Obsolete, replaced by REZRZ131450

Reznor 132204 Transformer, 120 to 24V, 20VA, 50/60HZ

Reznor
  • Mfr Part # 132204
  • Parts Town # REZ132204
  • Quantity0

Obsolete, replaced by REZRZ132204

Reznor 146465 Limit Switch, Fan, No Bracket, F135-40F

Reznor
  • Mfr Part # 146465
  • Parts Town # REZ146465
  • Quantity0

Obsolete, replaced by REZRZ146465

91011