Model # M1MB070 Official Nordyne furnace

Here are the diagrams and repair parts for Official Nordyne M1MB070 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.

Installation guide

Model diagram and schematic

SEARCH WITHIN THIS MODEL

ALL PARTS

Showing 10 of 49 parts |

#40

Furnace diagram

Igniter

Part #903596

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

#35

Furnace diagram

Furnace blower assembly

Part #903773

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

Furnace diagram

Furnace air filter

Part #669064

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

#39

Furnace diagram

Blower wheel

Part #667037

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

#NI

Furnace diagram

Orifice

Part #661042

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

#11

Furnace diagram

Switch

Part #632337

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

Furnace Electronic Integrated Control Board 903429

#28

Furnace diagram

Furnace electronic integrated control board

Part #903429

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

Furnace diagram

Door striker

Part #668905

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

#49

Furnace diagram

Furnace burner igniter

Part #903110

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

#29

Furnace diagram

Heat exchanger

Part #903419

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

What should I do about a damaged snowblower tire?

Main causes: punctured tire, damaged rim…

Why does my snowblower stop running after a few seconds?

Main causes: dirty carburetor, stale fuel…

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 start?

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

Why won't my snowblower chute turn?

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

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 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…

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…

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…

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 replace a snowblower fuel filter

Replace the fuel filter on your snowblower if it's clogged or damaged.…

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

How to replace a snowblower chute control gearbox assembly

Replace the chute control gearbox on your snowblower if it's stripped or damaged.…

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 # M1MB070 Official Nordyne furnace

Model diagram and schematic

SEARCH WITHIN THIS MODEL

Symptoms for gas snowblowers

What should I do about a damaged snowblower tire?

Why does my snowblower stop running after a few seconds?

Why does my snowblower engine run rough?

Why won't my snowblower start?

Why won't my snowblower chute turn?

Why doesn't my snowblower self propel?

Why won't my snowblower throw snow far enough?

Why doesn't my snowblower auger turn?

How do I tune up my snowblower?

Repair guides for gas snowblowers

How to replace a snowblower fuel filter

How to replace a snowblower shave plate

How to replace a snowblower chute control gearbox assembly

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