/
/
Parts town. Get real parts faster

Shopping Cart

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

Find Equipment Manuals

Loading...
Loading...
  1. Home
  2. /
  3. Reznor
  4. /
  5. B 400

Reznor B 400 Parts & Manuals

Manufacturer:

Model #:

Reznor

B 400

Unit Heater

Unit Heater

get special offers & news from parts town

+52 558.957.7295
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 Summer Season! SHOP NOW

Call: +52 558.957.7295
Hvac Parts
TECHTOWN
Track My Order
HVAC Parts Are Here!

HVAC Parts Are Here!

Shop the top brands in the industry.

Take Parts Town on the Go!

Take Parts Town on the Go!

Download the industry's #1 app today!

Find the parts you need to fix equipment!

Find the parts you need to fix equipment!

Based on data from techs, powered by AI!

We are ready to help!

We are ready to help!

We offer customer service support in Spanish

Flat rate shipping anywhere in Mexico $49.99

Flat rate shipping anywhere in Mexico $49.99

Inclusive of duties and brokerage.

Find the parts you need to fix equipment!

Find the parts you need to fix equipment!

Based on data from techs, powered by AI!

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
  • Parts In Town
  • Serial Number Lookup
  • Smart Manuals
  • Website Features
  • Terms of Use
  • Privacy Policy
  • Privacy Request

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