Model # GDPI120-5 Official Goodman gas furnace

Here are the diagrams and repair parts for Official Goodman GDPI120-5 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 87 parts |

Electrical & hardware diagram

Transformer

Part #B11416-00

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

#1A

Blower assemblies diagram

Capacitor 10

Part #B9456-52

Replaced by #12908

This item is not returnable

$5.26 |

16% OFF Phone Price : $6.26

In Stock

Qty

#2A

Blower assemblies diagram

Motor

Part #B13400-12

Replaced by #B13400-21S

$333.82

In Stock

Qty

Gas furnace diagram

Valve assembly

Part #12826-02S

Replaced by #B1282602

$350.69

In Stock

Qty

Blower assemblies diagram

Blower wheel

Part #B13680-00

Replaced by #D6723311S

$163.84

In Stock

Qty

#3A

Blower assemblies diagram

Blower wheel

Part #B13680-16

Replaced by #B1368016S

$107.24

In Stock

Qty

#1B

Heat exchanger assembly diagram

Limit, 220f,

Part #B13700-11

Replaced by #1370911S

$48.84

Back Order

Qty

#1A

Gas furnace diagram

Gas valve

Part #12826-06S

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

Heat exchanger assembly diagram

Limit, 150f,

Part #B13700-06

Replaced by #1370906S

$48.84

In Stock

Qty

#1B

Gas furnace diagram

Kit, serv ga

Part #12826-07S

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

Symptoms for gas snowblowers

Choose a symptom to see related snowblower repairs.

View all

Why doesn't my snowblower self propel?

Main causes: loose drive clutch cable, damaged drive clutch cable, worn friction disc, scraper blade scraping the ground…

Why does my snowblower engine run rough?

Main causes: dirty carburetor, clogged fuel filter, dirty spark plug, incorrect valve lash, leaky engine gaskets…

Why won't my snowblower throw snow far enough?

Main causes: clogged chute, damaged auger blades, broken shear pins, worn auger belt, damaged gear case, engine problems…

How do I tune up my snowblower?

Things to do: replace the spark plug, change the oil, rebuild the carburetor, adjust valve lash, adjust or replace the b…

Why won't my snowblower chute turn?

Main causes: snow build-up in chute, chute drive mechanism failure, bad chute control assembly…

Why won't my snowblower start?

Main causes: stale gas, clogged carburetor, clogged or broken fuel line, dirty spark plug, bad rewind starter, incorrect…

Why does my snowblower stop running after a few seconds?

Main causes: dirty carburetor, stale fuel…

Why won't my snowblower clear snow well?

Main causes: clogged chute, snow build-up in auger housing, broken auger shear pins, auger drive belt needs adjustment, …

Why doesn't my snowblower auger turn?

Main causes: broken shear pins, worn or loose auger drive belt, auger drive cable failure, damaged auger, bad gear case…

Repair guides for gas snowblowers

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

View all

How to adjust snowblower engine valve lash

Adjust the engine valve lash on your snowblower to keep the engine starting and running smoothly.…

Repair difficulty

Time required

15 minutes or less

How to adjust snowblower skid shoes

To prevent snowblower auger and shave plate damage, adjust the skid shoes regularly to keep the shave plate ¼-inch high.…

Repair difficulty

Time required

15 minutes or less

How to replace a snowblower shave plate

Follow the 7 easy steps in this repair guide/video to replace a worn out shave plate on your snowblower.…

Repair difficulty

Time required

15 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 snowblower.

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 # GDPI120-5 Official Goodman gas furnace

Model diagram and schematic

SEARCH WITHIN THIS MODEL

Symptoms for gas snowblowers

Why doesn't my snowblower self propel?

Why does my snowblower engine run rough?

Why won't my snowblower throw snow far enough?

How do I tune up my snowblower?

Why won't my snowblower chute turn?

Why won't my snowblower start?

Why does my snowblower stop running after a few seconds?

Why won't my snowblower clear snow well?

Why doesn't my snowblower auger turn?

Repair guides for gas snowblowers

How to adjust snowblower engine valve lash

How to adjust snowblower skid shoes

How to replace a snowblower shave plate

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

Tips to find your model number

Model numbers typically look like this: