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Dunkirk
Boiler

Model # Q90-50 SERIES 4 Official Dunkirk boiler

Here are the diagrams and repair parts for Official Dunkirk Q90-50-SERIES-4 boiler, as well as links to manuals and error code tables, if available.

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Model diagram and schematic

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ALL PARTS
Showing 10 of 96 parts  |
Boiler Burner Igniter 43800013
#21

Mixer assy diagram

Boiler burner igniter

Part #43800013

$166.35 | 
7% OFF Phone Price : $178.35
In Stock
Boiler Integrated Control Board 14662803
#12

Base assy diagram

Boiler integrated control board

Part #14662803

$253.90 | 
5% OFF Phone Price : $265.90
Back Order
Screw HW06501
#1

Exhaust assy diagram

Screw

Part #HW06501

This item is not returnable
$6.37
In Stock
Screw 14695809
Screw

Part #14695809

This item is not returnable
$6.37
In Stock
Tube 240009291
#1

Drain trap assy diagram

Tube

Part #240009291

$8.49
In Stock
Plug 14693805
#25

Mixer assy diagram

Plug

Part #14693805

This item is not returnable
$6.37
In Stock
Adapter 12101021
#6

Exhaust assy diagram

Adapter

Part #12101021

$284.71
In Stock
Fitting 14631005
Fitting

Part #14631005

$12.74
In Stock
Screw 240007745
#17

Exhaust assy diagram

Screw

Part #240007745

This item is not returnable
$6.37
In Stock
Dunkirk Orifice 43331094
#26

Mixer assy diagram

Dunkirk orifice

Part #43331094

$91.13
In Stock

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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'…

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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…

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Repair difficulty
Time required
 30 minutes or less

Articles and videos for treadmills

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How to enjoy all the online benefits we offer on our Sears PartsDirect website

Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…

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Top questions about Sears and Sears PartsDirect

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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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