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DP 21-3900A treadmill Parts
Here are the diagrams and repair parts for DP 21-3900A treadmill, as well as links to manuals and error code tables, if available.
By Schematic
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Browse Parts for 21-3900A Fitness & Exercise
Control panel diagram
Bolt
Part #22011500
The manufacturer no longer makes this part, and there's no substitute part
Motor and walking belt assembly diagram
L End Cover
Part #09118600
The manufacturer no longer makes this part, and there's no substitute part
Control panel diagram
Screw
Part #23018300
The manufacturer no longer makes this part, and there's no substitute part
#NI
All parts diagram
Lock Washer
Part #26009700
The manufacturer no longer makes this part, and there's no substitute part
Washer
Part #26000400
The manufacturer no longer makes this part, and there's no substitute part
Control panel diagram
Console Btm
Part #09134900
The manufacturer no longer makes this part, and there's no substitute part
Motor and walking belt assembly diagram
Mtr Contrllr
Part #37035600
The manufacturer no longer makes this part, and there's no substitute part
Control panel diagram
Exercise Equipment Reset Switch
Part #37024500
The manufacturer no longer makes this part, and there's no substitute part
Control panel diagram
Lock Nut
Part #25021200
The manufacturer no longer makes this part, and there's no substitute part
Motor and walking belt assembly diagram
Speed Sensor
Part #37011100
The manufacturer no longer makes this part, and there's no substitute part
Most common symptoms to help you fix your fitness & exercise
Choose a symptom to see related treadmill repairs.
Main causes: bad resistance motor, faulty control console, wiring failure…
Main causes: dead batteries, power supply failure, bad wiring connections, faulty control console…
Repair guides for treadmills
These step-by-step repair guides will help you safely fix what’s broken on your treadmill.
How to replace a treadmill walking board
A worn-out walking board creates friction with the walking belt and causes the belt to slow down during use. Replace the…
Repair time and Difficulty
30 minutes or less
How to replace a treadmill drive motor
A defective drive motor won't run when activated by the motor controller. Replace the treadmill drive motor if it doesn'…
Repair time and Difficulty
15 minutes or less
How to replace a treadmill walking belt
A worn walking belt will begin to slow down during use. If your treadmill walking belt is worn out, replace it using the…
Repair time and Difficulty
45 minutes or less
Effective articles & videos to help repair your fitness & exercise
Use the advice and tips in these articles and videos to get the most out of your treadmill.
Get answers to frequently asked questions about Sears and Sears PartsDirect.…
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