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Broan
Downdraft Ventilation System

Model # HLB3 Official Broan blower

Here are the diagrams and repair parts for Official Broan HLB3 blower, as well as links to manuals and error code tables, if available.

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

Owner’s manual

Model diagram and schematic

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ALL PARTS
Showing 10 of 27 parts  |
Range Hood Fan Motor Mount 99100491
#16

Blower diagram

Range hood fan motor mount

Part #99100491

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

Blower Assembly 97016792
#B1

Blower diagram

Blower assembly

Part #97016792

$137.99
In Stock
Transition S414
#24

Blower diagram

Transition

Part #S414

$78.63
In Stock
Instruction Manual 99043698B
#NI

Blower diagram

Instruction manual

Part #99043698B

This item is not returnable
$2.16
In Stock
Scroll Assembly 97014775
#10

Blower diagram

Scroll assembly

Part #97014775

Replaced by #S97014775

?
Manufacturer substitution
This part replaces 97014775. Substitute parts can look different from the original.
$45.88
In Stock
Housing Assembly 97014736
#1A

Blower diagram

Housing assembly

Part #97014736

Replaced by #S97014736

?
Manufacturer substitution
This part replaces 97014736. Substitute parts can look different from the original.
$48.06
In Stock
Housing Assembly 97014735
#1

Blower diagram

Housing assembly

Part #97014735

Replaced by #S97014735

?
Manufacturer substitution
This part replaces 97014735. Substitute parts can look different from the original.
$48.06
In Stock
Grille Nut 99420470
#20

Blower diagram

Grille nut

Part #99420470

Replaced by #S99420470

?
Manufacturer substitution
This part replaces 99420470. Substitute parts can look different from the original.
This item is not returnable
$6.66
In Stock
Oven Wire Harness 97006039
#18

Blower diagram

Oven wire harness

Part #97006039

Replaced by #S97006039

?
Manufacturer substitution
This part replaces 97006039. Substitute parts can look different from the original.
$8.19
In Stock
Range Hood Screw, #8-18 X 1/4-in 99150415
#5

Blower diagram

Range hood screw, #8-18 x 1/4-in

Part #99150415

Replaced by #S99150415

?
Manufacturer substitution
This part replaces 99150415. Substitute parts can look different from the original.
This item is not returnable
$3.64
In Stock

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 rise up?

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

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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 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 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 doesn't the downdraft vent fan pull much air?

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

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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 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…

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Repair difficulty
Time required
 15 minutes or less
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.…

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Repair difficulty
Time required
 15 minutes or less
How to replace a downdraft vent up/down switch

How to replace a downdraft vent up/down switch

The up/down switch starts the gear motor to raise and lower the air vent. Replace the up/down switch if defective.…

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 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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How to use a multimeter to test electrical parts video

How to use a multimeter to test electrical parts video

Learn how to use a multimeter to check for wiring problems in an appliance that's not working…

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Troubleshooting tips for a rectractable downdraft vent

Troubleshooting tips for a rectractable downdraft vent

See what to check if you are having a problem with a retractable downdraft vent.…

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