Carrier
Air Handler

Model # 40BNQ018301 Official Carrier air handler

Here are the diagrams and repair parts for Official Carrier 40BNQ018301 air handler, as well as links to manuals and error code tables, if available.

There are a couple of ways to find the part or diagram you need:

  • Click a diagram to see the parts shown on that diagram.
  • In the search box below, enter all or part of the part number or the part’s name.

Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

We encourage you to save the model to your profile, so it’s easy to access parts and manuals for your appliance whenever you log in.

For DIY troubleshooting advice and repair guides, visit our repair help section.

Model diagram and schematic

SEARCH WITHIN THIS MODEL

?

This is the number corresponding to the part on the diagram / schematic

Search
ALL PARTS
Showing 10 of 29 parts  |

Control Box Asy(12-15) 51303540500
#11

Air handler diagram

Control box asy(12-15)

Part #51303540500

The manufacturer no longer makes this part, and there's no substitute part

Cover, Piping 51301291600
#2

Air handler diagram

Cover, piping

Part #51301291600

The manufacturer no longer makes this part, and there's no substitute part

Fan Motor 51301323700
#6

Air handler diagram

Fan motor

Part #51301323700

The manufacturer no longer makes this part, and there's no substitute part

Circuit Board 51303518400
#15

Air handler diagram

Circuit board

Part #51303518400

The manufacturer no longer makes this part, and there's no substitute part

Drain Hose 51202360500
#23

Air handler diagram

Drain hose

Part #51202360500

The manufacturer no longer makes this part, and there's no substitute part

Svc Cover 51300908200
#18

Air handler diagram

Svc cover

Part #51300908200

The manufacturer no longer makes this part, and there's no substitute part

Evaporator Coil 51308470550
#3

Air handler diagram

Evaporator coil

Part #51308470550

The manufacturer no longer makes this part, and there's no substitute part

Ext. Cable 51308971920
#28

Air handler diagram

Ext. cable

Part #51308971920

The manufacturer no longer makes this part, and there's no substitute part

Cntrl Mtr 51303512800
#14

Air handler diagram

Cntrl mtr

Part #51303512800

The manufacturer no longer makes this part, and there's no substitute part

Bracket, L 51300900700
#8

Air handler diagram

Bracket, l

Part #51300900700

The manufacturer no longer makes this part, and there's no substitute part

Symptoms for gas snowblowers

Choose a symptom to see related snowblower repairs.

Main causes: punctured tire, damaged rim…

Main causes: dirty carburetor, stale fuel…

Main causes: dirty carburetor, clogged fuel filter, dirty spark plug, incorrect valve lash, leaky engine gaskets…

Main causes: stale gas, clogged carburetor, clogged or broken fuel line, dirty spark plug, bad rewind starter, incorrect…

Main causes: snow build-up in chute, chute drive mechanism failure, bad chute control assembly…

Main causes: loose drive clutch cable, damaged drive clutch cable, worn friction disc, scraper blade scraping the ground…

Main causes: clogged chute, damaged auger blades, broken shear pins, worn auger belt, damaged gear case, engine problems…

Main causes: broken shear pins, worn or loose auger drive belt, auger drive cable failure, damaged auger, bad gear case…

Things to do: replace the spark plug, change the oil, rebuild the carburetor, adjust valve lash, adjust or replace the b…

Repair guides for gas snowblowers

These step-by-step repair guides will help you safely fix what’s broken on your snowblower.

How to replace a snowblower fuel filter

How to replace a snowblower fuel filter

Replace the fuel filter on your snowblower if it's clogged or damaged.…

Repair difficulty
Time required
 15 minutes or less
How to replace a snowblower shave plate

How to replace a snowblower shave plate

Follow the 7 easy steps in this repair guide/video to replace a worn out shave plate on your snowblower.…

Repair difficulty
Time required
 15 minutes or less
How to replace a snowblower chute control gearbox assembly

How to replace a snowblower chute control gearbox assembly

Replace the chute control gearbox on your snowblower if it's stripped or damaged.…

Repair difficulty
Time required
 15 minutes or less

Effective articles & videos to help repair your air handlers

Use the advice and tips in these articles and videos to get the most out of your snowblower.

Introducing new technical repair content that we’re developing for the Sears Technical Institute

Introducing new technical repair content that we’re developing for the Sears Technical Institute

Learn about Sears Technical Institute and the advanced technical content being developed for aspiring appliance techs.…