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Cozy
Furnace

Model # 88N75 (733350 - 739750) Official Cozy floor furnace

Here are the diagrams and repair parts for Official Cozy 88N75-733350-739750 floor furnace, as well as links to manuals and error code tables, if available.

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  • In the search box below, enter all or part of the part number or the part’s name.

Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

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Model diagram and schematic

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ALL PARTS
Showing 10 of 70 parts  |
Thermocouple 74305
#31

Furnace body diagram

Thermocouple

Part #74305

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

Control 74303
#42

Furnace body diagram

Control

Part #74303

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

Valve 74315
#26

Furnace body diagram

Valve

Part #74315

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

Thermostat 86590
#22

Furnace body diagram

Thermostat

Part #86590

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

Screw 50106
#40

Furnace body diagram

Screw

Part #50106

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

Pilot Tube 24034
#34

Furnace body diagram

Pilot tube

Part #24034

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

Wire 74518
#23

Furnace body diagram

Wire

Part #74518

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

Manifold 74413
#38A

Furnace body diagram

Manifold

Part #74413

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

Cap Glass 74504
#6

Furnace body diagram

Cap glass

Part #74504

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

Harness 74313

#NI

All parts diagram

Harness

Part #74313

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

Symptoms for treadmills

Choose a symptom to see related treadmill repairs.

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Why does my treadmill's walking belt slow down?

Main causes: damaged walking belt, improper belt tension, lack of belt lubricant, bad drive motor…

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Why is my treadmill's walking belt slipping?

Main causes: damaged walking belt, improper belt tension, bad roller bearing…

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Why is my treadmill's walking belt off center?

Main causes: rear roller out of alignment, damaged walking belt, bad roller…

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Why won't my treadmill start even though the console display works?

Main causes: missing safety key, bad control console, wiring failure, faulty motor control board, bad drive motor…

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Why is my treadmill's heart rate sensor not accurate?

Main causes: faulty sensors, wiring failure, bad control console…

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Why does my treadmill have no display?

Main causes: bad control console, wiring failure, bad motor control board…

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Why won't my treadmill power up?

Main causes: no power, bad power cord, tripped or faulty overload switch, bad power switch, wiring failure, bad motor co…

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Repair guides for treadmills

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

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How to replace a treadmill motor controller

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…

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Repair difficulty
Time required
 15 minutes or less
How to replace a treadmill drive motor

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'…

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace a treadmill walking board

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…

Read more
Repair difficulty
Time required
 30 minutes or less

Effective articles & videos to help repair your furnaces

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

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How to get your furnace ready for winter

How to get your furnace ready for winter

Get expert tips for preparing your furnace for winter. Follow maintenance tips to keep your furnace in top shape.…

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Introducing new technical repair content that we’re developing for the Sears Technical Institute

Introducing new technical repair content that we’re developing for the Sears Technical Institute

Learn about Sears Technical Institute and the advanced technical content being developed for aspiring appliance techs.…

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Top questions about Sears and Sears PartsDirect

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