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Broan
Downdraft Ventilation System

Model # 634 Official Broan venting system

Here are the diagrams and repair parts for Official Broan 634 venting system, as well as links to manuals and error code tables, if available.

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Installation guide

Model diagram and schematic

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Showing 10 of 11 parts  |
Seal Strip 99500322
#6

Venting assy diagram

Seal strip

Part #99500322

Replaced by #S99500322

?
Manufacturer substitution
This part replaces 99500322. Substitute parts can look different from the original.
This item is not returnable
$4.18
In Stock
Plate Damper 98005584
#8

Venting assy diagram

Plate damper

Part #98005584

Replaced by #S98005584

?
Manufacturer substitution
This part replaces 98005584. Substitute parts can look different from the original.
$7.67
In Stock
Range Hood Outlet Box Cover Screw 99170245
#4

Venting assy diagram

Range hood outlet box cover screw

Part #99170245

Replaced by #S99170245

?
Manufacturer substitution
This part replaces 99170245. Substitute parts can look different from the original.
This item is not returnable
$3.64
In Stock
Damper Rod 98005576
#7

Venting assy diagram

Damper rod

Part #98005576

Replaced by #S98005576

?
Manufacturer substitution
This part replaces 98005576. Substitute parts can look different from the original.
This item is not returnable
$3.37
In Stock
Bird Scrn 98005577
#3

Venting assy diagram

Bird scrn

Part #98005577

Replaced by #S98005577

?
Manufacturer substitution
This part replaces 98005577. Substitute parts can look different from the original.
This item is not returnable
$3.38
In Stock
Seal Strip 99500321
#5

Venting assy diagram

Seal strip

Part #99500321

Replaced by #S99500321

?
Manufacturer substitution
This part replaces 99500321. Substitute parts can look different from the original.
This item is not returnable
$4.18
In Stock
Damper Flap 98005581
#2

Venting assy diagram

Damper flap

Part #98005581

Replaced by #S98005581

?
Manufacturer substitution
This part replaces 98005581. Substitute parts can look different from the original.
This item is not returnable
$3.46
In Stock
Housing, Alum. 97006250
#1A

Venting assy diagram

Housing, alum.

Part #97006250

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

Screw, Silver 99150576
#4A

Venting assy diagram

Screw, silver

Part #99150576

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

Damper Plate, Alum. 98005598
#8A

Venting assy diagram

Damper plate, alum.

Part #98005598

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 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 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.…

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Repair difficulty
Time required
 15 minutes or less
How to replace a downdraft vent blower motor

How to replace a downdraft vent blower motor

The blower motor spins the fan blade that removes smoke and steam from the cooktop area. Replace the blower motor if it …

Read more
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

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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