Model # GNJ100M20B1 Official ICP gas furnace

Here are the diagrams and repair parts for Official ICP GNJ100M20B1 gas furnace, as well as links to manuals and error code tables, if available.

There are a couple of ways to find the part or diagram you need:

Click a diagram to see the parts shown on that diagram.
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”.

We encourage you to save the model to your profile, so it’s easy to access parts and manuals for your appliance whenever you log in.

For DIY troubleshooting advice and repair guides, visit our repair help section.

Model diagram and schematic

SEARCH WITHIN THIS MODEL

ALL PARTS

Showing 10 of 64 parts |

Furnace Pilot Igniter And Sensor (replaces B14010-11s, Q3400a1040) 1009524

#28

Functional replacement diagram

Furnace pilot igniter and sensor (replaces b14010-11s, q3400a1040)

Part #1009524

$166.19 |

7% OFF Phone Price : $178.19

In Stock

Qty

Non-functional replacement diagram

Panel cutoff

Part #721020008

$252.09

In Stock

Qty

Furnace Burner (replaces 1012384) 1008725

#10

Functional replacement diagram

Furnace burner (replaces 1012384)

Part #1008725

$129.04

In Stock

Qty

#14

Functional replacement diagram

Tubing

Part #64930

$77.80

In Stock

Qty

Functional replacement diagram

Switch doo

Part #1010712

$28.69

In Stock

Qty

#17

Functional replacement diagram

Sw lmt t r

Part #1320364

$19.46

In Stock

Qty

#22

Functional replacement diagram

Gskt htx bnr

Part #2480906

$15.97

In Stock

Qty

#BB

Non-functional replacement diagram

Rail galv bl

Part #57059

$952.55

In Stock

Qty

#11

Functional replacement diagram

Furnace pilot burner

Part #1149856

$314.91 |

$12.00 OFF Phone Price : $326.91

In Stock

Qty

#16

Functional replacement diagram

Valve

Part #1009093

Replaced by #1170430

$674.90 |

$12.00 OFF Phone Price : $686.90

In Stock

Qty

Repair guides for side-by-side refrigerators

How to replace a foamed-in-place door gasket in a side-by-side refrigerator

The door gasket seals the gap around the door to keep the cold air in and the warm air out. Replace a worn or damaged do…

Repair difficulty

Time required

30 minutes or less

How to replace a press-in door gasket in a side-by-side refrigerator

The door gasket seals the gap around the door to keep the cold air in and the warm air out. Replace a worn or damaged do…

Repair difficulty

Time required

15 minutes or less

How to replace a refrigerator water valve

Replace the water valve that feeds water to the ice maker and water dispenser if it no longer controls the flow of water…

Repair difficulty

Time required

15 minutes or less

Effective articles & videos to help repair your furnaces

View all

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.…

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.…

Top questions about Sears and Sears PartsDirect

Model # GNJ100M20B1 Official ICP gas furnace

Model diagram and schematic

SEARCH WITHIN THIS MODEL

Repair guides for side-by-side refrigerators

How to replace a foamed-in-place door gasket in a side-by-side refrigerator

How to replace a press-in door gasket in a side-by-side refrigerator

How to replace a refrigerator water valve

Effective articles & videos to help repair your furnaces

How to get your furnace ready for winter

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

Top questions about Sears and Sears PartsDirect

Parts & More

Stay Connected

Quick links

Let us help you

More resources