Goodman
Furnace

Model # GMNT040-3B Official Goodman gas furnace

Here are the diagrams and repair parts for Official Goodman GMNT040-3B gas furnace, 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 154 parts  |

Igniter B1401015S
#131

Burner box assembly diagram

Igniter

Part #B1401015S

Replaced by #B1401018S

?
Manufacturer substitution
This part replaces B1401015S. Substitute parts can look different from the original.
$43.19
12% OFF Phone Price : $49.19
In Stock
Motor B4059001
#111

Heat exchanger assembly diagram

Motor

Part #B4059001

Replaced by #0131M00002PSP

?
Manufacturer substitution
This part replaces B4059001. Substitute parts can look different from the original.
$158.40
7% OFF Phone Price : $170.40
In Stock
Furnace Primary Thermal Limit Switch B1370188
#91B

Heat exchanger assembly diagram

Furnace primary thermal limit switch

Part #B1370188

In Stock
Furnace Air Pressure Switch B1370159
#351D

Misc. components/drain kit assembly diagram

Furnace air pressure switch

Part #B1370159

In Stock
Manifold B4026003
#191F

Burner box assembly diagram

Manifold

Part #B4026003

$48.92
11% OFF Phone Price : $54.92
In Stock
Furnace Burner Roll-out Limit Switch B1370145
#151

Burner box assembly diagram

Furnace burner roll-out limit switch

Part #B1370145

In Stock
Wheel Blow B1368016
#241B

Blower assembly diagram

Wheel blow

Part #B1368016

Replaced by #B1368016S

?
Manufacturer substitution
This part replaces B1368016. Substitute parts can look different from the original.
In Stock
Wheel B1368047A
#241

Blower assembly diagram

Wheel

Part #B1368047A

Replaced by #D6723306S

?
Manufacturer substitution
This part replaces B1368047A. Substitute parts can look different from the original.
$119.58
9% OFF Phone Price : $131.58
In Stock
Vent Motor B4833000
#111A

Heat exchanger assembly diagram

Vent motor

Part #B4833000

Replaced by #B4833000S

?
Manufacturer substitution
This part replaces B4833000. Substitute parts can look different from the original.
$353.00
$12.00 OFF Phone Price : $365.00
In Stock
Burner Box Top, 6 Cl (gmt140-5b, Gmnt120-5b) 4013009
#121D

Burner box assembly diagram

Burner box top, 6 cl (gmt140-5b, gmnt120-5b)

Part #4013009

In Stock

Symptoms for gas walk-behind mowers

Choose a symptom to see related walk-behind mower repairs.

Main causes: damaged cutting blade, loose cutting blade, damaged flywheel key, engine needs tune up…

Main causes: uneven wheel height settings, damaged wheel, dull or damaged cutting blade…

Main causes: engine needs tune up, dirty or clogged carburetor, damaged flywheel key…

Main causes: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel…

Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, ba…

Main causes: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent…

Repair guides for gas walk-behind mowers

These step-by-step repair guides will help you safely fix what’s broken on your walk-behind lawn mower.

How to rebuild a lawn mower carburetor

How to rebuild a lawn mower carburetor

The carburetor mixes air with fuel to drive the piston. Rebuild the carburetor if it's clogged or leaks.…

Repair difficulty
Time required
 60 minutes or less
How to replace a lawn mower recoil starter on an OHV engine

How to replace a lawn mower recoil starter on an OHV engine

Replace the recoil starter if it doesn't move when you pull the starter rope.…

Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower wheel

How to replace a lawn mower wheel

Learn how replace a damaged wheel on a walk-behind lawn mower—it's a quick, easy fix.…

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 walk-behind lawn mower.

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.…

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Top questions about Sears and Sears PartsDirect

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