Lifestyler
Treadmill

Model #374296221 Official Lifestyler ergometer treadmill

Here are the diagrams and repair parts for Lifestyler 374296221 ergometer treadmill, 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.

Showing 10 of 88 parts

Cotter Pin

#137

All parts Diagram

Cotter pin

Part #29058400

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

Hose Clamp

#175

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Hose clamp

Part #29091700

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

Screw

#142

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Screw

Part #20014700

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

Bolt

#119

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Bolt

Part #22009900

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

Screw

#106

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Screw

Part #21011800

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

Lock Nut

#120

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Lock nut

Part #25011100

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

Adj Washer

#157

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Adj washer

Part #26010300

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

Screw

#132

All parts Diagram

Screw

Part #21019900

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

Bolt

#133

All parts Diagram

Bolt

Part #22011500

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

Flat Washer

#109

All parts Diagram

Flat washer

Part #26011400

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

Symptoms for treadmills

Choose a symptom to see related treadmill repairs.

Main causes: faulty sensors, wiring failure, bad control console
Main causes: no power, bad power cord, tripped or faulty overload switch, bad power switch, wiring failure, bad motor control board
Main causes: missing safety key, bad control console, wiring failure, faulty motor control board, bad drive motor
Main causes: bad control console, wiring failure, bad motor control board
Main causes: damaged walking belt, improper belt tension, lack of belt lubricant, bad drive motor
Main causes: damaged walking belt, improper belt tension, bad roller bearing
Main causes: rear roller out of alignment, damaged walking belt, bad roller

Repair guides for treadmills

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

June 1, 2015
By Lyle Weischwill
How to replace a treadmill motor controller

Your treadmill motor won't run with a defective motor controller. Replace the motor controller if it doesn't operate the motor correctly.

Repair difficulty
Time required
 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 these steps.

Repair difficulty
Time required
 45 minutes or less
June 1, 2015
By Lyle Weischwill
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't run.

Repair difficulty
Time required
 15 minutes or less

Articles and videos common to all fitness & exercise

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

June 29, 2022

Top questions about Sears and Sears PartsDirect

By Lyle Weischwill

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