/
/








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...
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

The Parts Town mobile app and order history is down but our website is open for business. Thank you for your patience as we work through these issues.

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. RDH 400A

Part Category

  • Actuators(1)
  • Bearings & Bushings(4)
  • Belts, Pulleys & Sheaves(15)
  • Brackets & Retainers(4)
  • Burners(2)
  • Capacitors(2)
  • Caps & Plugs(6)
  • Clamps & Clips(2)
  • Condenser & Evaporator Coils(2)
  • Contactors(3)
  • Controls(9)
  • Conversion Kits(1)
  • Decals, Labels & Overlays(12)
  • Disconnects, Couplings & Collars(3)
  • Doors & Hardware(2)
  • Drain Parts(4)
  • Fan & Blower Motors(9)
  • Fan Blades & Blower Wheels(1)
  • Filters, Screens & Driers(35)
  • Fuses, Blocks & Holders(10)
  • Gaskets & Seals(14)
  • Handles(1)
  • Hinges(1)
  • Holders & Supports(9)
  • Hoses, Pipes & Tubing(14)
  • Ignition Modules(1)
  • Ignitors & Electrodes(2)
  • Light Sockets & Lampholders(1)
  • Nuts, Bolts & Screws(15)
  • Orifices(5)
  • Panels, Covers & Lids(18)
  • Pans, Trays & Wells(3)
  • Plates(1)
  • Probes & Sensors(7)
  • Pumps & Motors(20)
  • Relays(19)
  • Rods, Shafts & Pins(1)
  • Shelves & Racks(2)
  • Shields & Guards(6)
  • Springs(1)
  • Switches & Buttons(19)
  • Terminal Blocks(3)
  • Thermostats & High Limits(6)
  • Transformers(5)
  • Valves, Solenoids & Fittings(16)
  • Variable Frequency Drives (VFD)(3)
  • Washers, Rings & Spacers(5)
  • Wires, Cables & Hardware(5)
Cool,Calm and Collected- Real OEM HVAC Pars Are in Season! SHOP NOW

Part Category

  • Actuators(1)
  • Bearings & Bushings(4)
  • Belts, Pulleys & Sheaves(15)
  • Brackets & Retainers(4)
  • Burners(2)
  • Capacitors(2)
  • Caps & Plugs(6)
  • Clamps & Clips(2)
  • Condenser & Evaporator Coils(2)
  • Contactors(3)
  • Controls(9)
  • Conversion Kits(1)
  • Decals, Labels & Overlays(12)
  • Disconnects, Couplings & Collars(3)
  • Doors & Hardware(2)
  • Drain Parts(4)
  • Fan & Blower Motors(9)
  • Fan Blades & Blower Wheels(1)
  • Filters, Screens & Driers(35)
  • Fuses, Blocks & Holders(10)
  • Gaskets & Seals(14)
  • Handles(1)
  • Hinges(1)
  • Holders & Supports(9)
  • Hoses, Pipes & Tubing(14)
  • Ignition Modules(1)
  • Ignitors & Electrodes(2)
  • Light Sockets & Lampholders(1)
  • Nuts, Bolts & Screws(15)
  • Orifices(5)
  • Panels, Covers & Lids(18)
  • Pans, Trays & Wells(3)
  • Plates(1)
  • Probes & Sensors(7)
  • Pumps & Motors(20)
  • Relays(19)
  • Rods, Shafts & Pins(1)
  • Shelves & Racks(2)
  • Shields & Guards(6)
  • Springs(1)
  • Switches & Buttons(19)
  • Terminal Blocks(3)
  • Thermostats & High Limits(6)
  • Transformers(5)
  • Valves, Solenoids & Fittings(16)
  • Variable Frequency Drives (VFD)(3)
  • Washers, Rings & Spacers(5)
  • Wires, Cables & Hardware(5)
Cool,Calm and Collected- Real OEM HVAC Pars Are in Season! SHOP NOW

Model: RDH 400A

Manuals Available: 5

Installation & Operation Manual

View Manual

Installation & Operation Manual

View Manual

Installation & Operation Manual

View Manual

Parts Manual

View Manual

Service Manual

View Manual

Reznor RDH 400A Parts & Manuals

Manufacturer:

Model #:

Reznor

RDH 400A

Air Handler

Air Handler

Reznor 255350 Thermostat, Heating/Cooling, Wall Mount, 50-90F, 10-30C

Reznor
  • Mfr Part # 255350
  • Parts Town # REZ255350
  • Quantity3

In Stock, Ships today

Reznor RZ214979 Ignition Control Board, DSI

Reznor
  • Mfr Part # RZ214979
  • Parts Town # REZRZ214979
  • Quantity2

In Stock, Ships today

Reznor 110656 Relay, 125 Volt, 15 Amp, SPDT

Reznor
  • Mfr Part # 110656
  • Parts Town # REZ110656
  • Quantity1

In Stock, Ships today

Reznor 144972 Terminal Block, 3 Pole

Reznor
  • Mfr Part # 144972
  • Parts Town # REZ144972
  • Quantity5

In Stock, Ships today

Reznor 144973 Mount, KAD Terminal Block

Reznor
  • Mfr Part # 144973
  • Parts Town # REZ144973
  • Quantity6

In Stock, Ships today

Reznor 216386 Contactor, 3 Pole, 24VAC 50/60HZ Coil, 25 FLA

Reznor
  • Mfr Part # 216386
  • Parts Town # REZ216386
  • Quantity4

In Stock, Ships today

Reznor 214979 Ignition Control Board

Reznor
  • Mfr Part # 214979
  • Parts Town # REZ214979
  • Quantity2

In Stock, Ships today

Reznor 195668 Gasket/Insulation, Burner

Reznor
  • Mfr Part # 195668
  • Parts Town # REZ195668
  • Quantity2

In Stock, Ships today

Reznor 209339 Spark Electrode, 31-/2"

Reznor
  • Mfr Part # 209339
  • Parts Town # REZ209339
  • Quantity4

In Stock, Ships today

Reznor 10159 BOX OLT #52171 4 X 4 X 2-1/2

Reznor
  • Mfr Part # 10159
  • Parts Town # REZ10159
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Reznor 103183 #6X1 HEX WASHER SLOT TS B ZINC

Reznor
  • Mfr Part # 103183
  • Parts Town # REZ103183
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Reznor 103502 HAND QUADRANT #14004728-001

Reznor
  • Mfr Part # 103502
  • Parts Town # REZ103502
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Reznor 104104 FILTER 16 X 16 X 1 PLEATED

Reznor
  • Mfr Part # 104104
  • Parts Town # REZ104104
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Reznor 104105 FILTER 16 X 20 X 1 PLEATED

Reznor
  • Mfr Part # 104105
  • Parts Town # REZ104105
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Reznor 105648 2SPD 3HP MOTOR

Reznor
  • Mfr Part # 105648
  • Parts Town # REZ105648
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Reznor 106748 Pulley/Sheave, Motor, 7/8" Bore

Reznor
  • Mfr Part # 106748
  • Parts Town # REZ106748
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Reznor 107186 PUMP

Reznor
  • Mfr Part # 107186
  • Parts Town # REZ107186
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Reznor 10756 OBSERVATION HOLE COVERS

Reznor
  • Mfr Part # 10756
  • Parts Town # REZ10756
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Reznor 111096 HOLE PLUG #DP625 BLACK #2663

Reznor
  • Mfr Part # 111096
  • Parts Town # REZ111096
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Reznor 111387 DIN RAIL

Reznor
  • Mfr Part # 111387
  • Parts Town # REZ111387
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Reznor 111560 Motor, Blower, 208-230 Volt, 1 PH, 3 HP, 3450 RPM

Reznor
  • Mfr Part # 111560
  • Parts Town # REZ111560
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Reznor 111562 5HP 208/240V 1PH BELT DRIVEN

Reznor
  • Mfr Part # 111562
  • Parts Town # REZ111562
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Reznor 111564 3HP 120/240V MOTOR

Reznor
  • Mfr Part # 111564
  • Parts Town # REZ111564
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Reznor 111731 SENSING TUBE MOUNTING PLATE

Reznor
  • Mfr Part # 111731
  • Parts Town # REZ111731
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

123