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Broan
Downdraft Ventilation System

Model # 336 Official Broan exterior mounted blower

Here are the diagrams and repair parts for Official Broan 336 exterior mounted blower, as well as links to manuals and error code tables, if available.

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  • 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”.

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

Installation guide

Model diagram and schematic

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Showing 10 of 21 parts  |
Trash Compactor Lock Nut 99260477
#18

Blower parts diagram

Trash compactor lock nut

Part #99260477

Replaced by #S99260477

?
Manufacturer substitution
This part replaces 99260477. Substitute parts can look different from the original.
This item is not returnable
$3.64
In Stock
Broan Instruction Manual 99043915C
#NI

Blower parts diagram

Broan instruction manual

Part #99043915C

This item is not returnable
$2.99
In Stock
Range Hood Grounding Screw (green) 99150471
#19

Blower parts diagram

Range hood grounding screw (green)

Part #99150471

Replaced by #S99150471

?
Manufacturer substitution
This part replaces 99150471. Substitute parts can look different from the original.
This item is not returnable
$3.64
In Stock
Spring 99140145
#5

Blower parts diagram

Spring

Part #99140145

Replaced by #S99140145

?
Manufacturer substitution
This part replaces 99140145. Substitute parts can look different from the original.
This item is not returnable
$25.71
In Stock
Terminal Boot 99100530
#10

Blower parts diagram

Terminal boot

Part #99100530

Replaced by #S99100530

?
Manufacturer substitution
This part replaces 99100530. Substitute parts can look different from the original.
This item is not returnable
$5.38
In Stock
Bushing 99400079
#12

Blower parts diagram

Bushing

Part #99400079

Replaced by #S99400079

?
Manufacturer substitution
This part replaces 99400079. Substitute parts can look different from the original.
This item is not returnable
$6.27
In Stock
Cover 98009538
#1

Blower parts diagram

Cover

Part #98009538

Replaced by #S98009538

?
Manufacturer substitution
This part replaces 98009538. Substitute parts can look different from the original.
$110.63
In Stock
Cord Clamp 99270461
#17

Blower parts diagram

Cord clamp

Part #99270461

Replaced by #S99270461

?
Manufacturer substitution
This part replaces 99270461. Substitute parts can look different from the original.
This item is not returnable
$4.00
In Stock
Foam Seal 99100531
#2

Blower parts diagram

Foam seal

Part #99100531

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

Screw 99150506
#16

Blower parts diagram

Screw

Part #99150506

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

Most common symptoms to help you fix your downdraft ventilation systems

Choose a symptom to see related downdraft vent repairs.

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Why won't my downdraft vent lower down?

Main causes: electrical power failure, up/down activation switch problems, vent gear motor failure…

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Why won't the fan on my downdraft vent blow air?

Main causes: fan control switch failure, bad blower fan motor, broken blower wheel, wiring failure…

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Why won't my downdraft vent rise up?

Main causes: lack of electrical power, up/down activation switch failure, bad vent gear motor…

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Why does the downdraft vent raise and lower continuously?

Main causes: problems with the vent limit switches, up/down activation switch failure…

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Why doesn't the downdraft vent fan pull much air?

Main causes: clogged grease filters, air duct problems, fan motor failure, broken blower wheel…

Read more

Most common repair guides to help fix your downdraft ventilation systems

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

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How to replace a downdraft vent gear motor

How to replace a downdraft vent gear motor

The gear motor raises and lowers the air vent when you push the activating switch. Replace the gear motor if defective.…

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace a downdraft vent up/down button pad

How to replace a downdraft vent up/down button pad

The up/down button pad located on top of the air vent engages the activating switch when pushed to raise the air vent. R…

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace a downdraft vent fan control switch

How to replace a downdraft vent fan control switch

The fan control switch activates the blower motor and controls the fan speed. Replace the fan control switch if it's not…

Read more
Repair difficulty
Time required
 15 minutes or less

Effective articles & videos to help repair your downdraft ventilation systems

Use the advice and tips in these articles to get the most out of your downdraft vent.

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How to enjoy all the online benefits we offer on our Sears PartsDirect website

How to enjoy all the online benefits we offer on our Sears PartsDirect website

Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…

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Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…

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How to repair broken or damaged wires video

How to repair broken or damaged wires video

Learn how to repair broken, frayed or damaged wires in your appliances.…

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