GMC
Furnace

Model # GMN100-4 Official GMC gas furnace

Here are the diagrams and repair parts for Official GMC GMN100-4 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

?

This is the number corresponding to the part on the diagram / schematic

Search
ALL PARTS
Showing 10 of 62 parts  |

Hsi Module B18099-08
#40

Heat assembly/electrical diagram

Hsi module

Part #B18099-08

Replaced by #B1809913S

?
Manufacturer substitution
This part replaces B18099-08. Substitute parts can look different from the original.
This item is not returnable
$185.31
6% OFF Phone Price : $197.31
In Stock
Capacitor 10 B9456-52
#38

Heat assembly/electrical diagram

Capacitor 10

Part #B9456-52

Replaced by #12908

?
Manufacturer substitution
This part replaces B9456-52. Substitute parts can look different from the original.
This item is not returnable
$5.26
16% OFF Phone Price : $6.26
In Stock
Blower Wheel B13680-47
#18

Heat exchanger diagram

Blower wheel

Part #B13680-47

Replaced by #D6723306S

?
Manufacturer substitution
This part replaces B13680-47. Substitute parts can look different from the original.
$119.58
9% OFF Phone Price : $131.58
In Stock
Hot Surface B14010-09S
#4

Heat assembly/electrical diagram

Hot surface

Part #B14010-09S

Replaced by #41-412

?
Manufacturer substitution
This part replaces B14010-09S. Substitute parts can look different from the original.
$49.15
11% OFF Phone Price : $55.15
In Stock
Gas Valve B12826-15
#8

Heat assembly/electrical diagram

Gas valve

Part #B12826-15

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

Furnace Blower Shell 25393-03
#15

Heat exchanger diagram

Furnace blower shell

Part #25393-03

Replaced by #0271A00016S

?
Manufacturer substitution
This part replaces 25393-03. Substitute parts can look different from the original.
$120.53
9% OFF Phone Price : $132.53
In Stock
Burner Side 25140-00
#3

Heat assembly/electrical diagram

Burner side

Part #25140-00

Replaced by #0121F00146

?
Manufacturer substitution
This part replaces 25140-00. Substitute parts can look different from the original.
This item is not returnable
Back Order
Flue Col Box B28100-06
#25

Heat assembly/electrical diagram

Flue col box

Part #B28100-06

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

5 Cl, Burner 25135-03
#13

Heat assembly/electrical diagram

5 cl, burner

Part #25135-03

Replaced by #0121F00159

?
Manufacturer substitution
This part replaces 25135-03. Substitute parts can look different from the original.
In Stock
Limit B13700-10
#11

Heat assembly/electrical diagram

Limit

Part #B13700-10

Replaced by #1370910S

?
Manufacturer substitution
This part replaces B13700-10. Substitute parts can look different from the original.
$55.18
10% OFF Phone Price : $61.18
In Stock

Effective articles & videos to help repair your furnaces

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.…

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.…

Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

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