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Universal/Multiflex (Frigidaire)
Dishwasher

Model # MDB421RHS2 Official Universal/Multiflex (Frigidaire) dishwasher

Here are the diagrams and repair parts for Official Universal/Multiflex (Frigidaire) MDB421RHS2 dishwasher, as well as links to manuals and error code tables, if available.

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Owner’s manual
Error Codes

Model diagram and schematic

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ALL PARTS
Showing 10 of 104 parts  |
Gasket 154211801
#3

Tub diagram

Gasket

Part #154211801

Replaced by #154827601

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Manufacturer substitution
This part replaces 154211801. Substitute parts can look different from the original.
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$31.02 | 
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Control Arm 154250801
#24

Motor and pump diagram

Control arm

Part #154250801

Replaced by #5304517203

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Manufacturer substitution
This part replaces 154250801. Substitute parts can look different from the original.
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$39.00 | 
13% OFF Phone Price : $45.00
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Gasket 154297602
#49

Door diagram

Gasket

Part #154297602

Replaced by #809006501

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Manufacturer substitution
This part replaces 154297602. Substitute parts can look different from the original.
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Dishwasher Lower Spray Arm Support 154294101
#62

Motor and pump diagram

Dishwasher lower spray arm support

Part #154294101

Replaced by #5304518968

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Manufacturer substitution
This part replaces 154294101. Substitute parts can look different from the original.
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$15.09 | 
12% OFF Phone Price : $17.09
In Stock
Dishwasher Pump O-ring, Front 154247001
#59A

Motor and pump diagram

Dishwasher pump o-ring, front

Part #154247001

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Water Valve 154359801
#3

Frame diagram

Water valve

Part #154359801

Replaced by #154637401

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Manufacturer substitution
This part replaces 154359801. Substitute parts can look different from the original.
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$60.54 | 
9% OFF Phone Price : $66.54
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Dishwasher Wheel 154174501
#7

Racks diagram

Dishwasher wheel

Part #154174501

Replaced by #5304532229

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Manufacturer substitution
This part replaces 154174501. Substitute parts can look different from the original.
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Motor Bracket 154362301
#55

Motor and pump diagram

Motor bracket

Part #154362301

Replaced by #5304534830

?
Manufacturer substitution
This part replaces 154362301. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$5.34
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Motor 154395402
#70

Motor and pump diagram

Motor

Part #154395402

Replaced by #154859101

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Manufacturer substitution
This part replaces 154395402. Substitute parts can look different from the original.
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$160.00 | 
7% OFF Phone Price : $172.00
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Dishwasher Filter 154252301
#64

Motor and pump diagram

Dishwasher filter

Part #154252301

Replaced by #5304506533

?
Manufacturer substitution
This part replaces 154252301. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$18.64 | 
10% OFF Phone Price : $20.64
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Most common symptoms to help you fix your dishwashers

Choose a symptom to see related dishwasher repairs.

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Why does my dishwasher door drop open too fast?

Main causes: broken door spring, damaged or broken door hinge…

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Why don't my dishes get dry?

Main causes: not using rinse aid, rinse aid dispenser failure, broken heating element, malfunctioning vent, drying fan f…

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Why won't my dishwasher fill?

Main causes: water supply problem, stuck overfill float, clogged water inlet valve screen, water inlet valve failure…

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Why won't my dishwasher start?

Main causes: light switch beside the sink turned off, lack of power, bad dishwasher door switch, control system failure,…

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Why isn't my dishwasher getting dishes clean?

Main causes: improper loading, low water temperature, improper detergent dosage, detergent dispenser failure, spray arm …

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Why is my dishwasher noisy?

Main causes: glass or popcorn kernel stuck in the chopper blade, drain line vibrating against the cabinet, debris in was…

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Why won't my dishwasher drain?

Main causes: clogged kitchen sink drain, clogged drain hose, drain check valve damaged, drain pump failure, control syst…

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Why can't I adjust the dishwasher rack height?

Main cause: damaged rack height adjuster…

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Why is my dishwasher leaking?

Main causes: damaged or stuck spray arm, leaking door seal, damaged door hinge, leaky heating element water seal, cracke…

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Most common repair guides to help fix your dishwashers

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

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How to replace a dishwasher water inlet valve

How to replace a dishwasher water inlet valve

If your dishwasher fills constantly or won't fill at all, the water inlet valve has failed. You can replace it in about …

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Repair difficulty
Time required
 30 minutes or less
How to replace a dishwasher detergent dispenser

How to replace a dishwasher detergent dispenser

Dishes need dish detergent to get clean. Learn how to replace a dishwasher detergent dispenser with easy step-by-step i…

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Repair difficulty
Time required
 30 minutes or less
How to replace a dishwasher door outer panel

How to replace a dishwasher door outer panel

If your dishwasher door is dented or you want it to match your cabinets or other appliances, this guide shows how to rep…

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Repair difficulty
Time required
 15 minutes or less

Effective articles & videos to help repair your dishwashers

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

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How to clean and maintain your dishwasher

How to clean and maintain your dishwasher

Get tips for cleaning and maintaining your dishwasher…

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5 Holiday Cleaning Tasks Essential to Boosting Your Home’s Image

Get tips on completing essential holiday cleaning tasks to brighten your home.…

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