Furnace

Model # M1MB077 Official Nordyne furnace

Here are the diagrams and repair parts for Official Nordyne M1MB077 furnace, as well as links to manuals and error code tables, if available.

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Browse Parts for
M1MB077 Furnace
Capacitor 621435
#36

Furnace diagram

Capacitor

Part #621435

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

Igniter 903596
#40

Furnace diagram

Igniter

Part #903596

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

Fuse 632261
#NI

Furnace diagram

Fuse

Part #632261

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

Transformer 621807
#13

Furnace diagram

Transformer

Part #621807

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

Door Striker 668905
#5

Furnace diagram

Door striker

Part #668905

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

Door Latch 668420
#6

Furnace diagram

Door latch

Part #668420

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

Furnace Air Filter 669064
#7

Furnace diagram

Furnace air filter

Part #669064

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

Blower Wheel 667037
#39

Furnace diagram

Blower wheel

Part #667037

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

Switch 632337
#11

Furnace diagram

Switch

Part #632337

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

Limit 626470
#26

Furnace diagram

Limit

Part #626470

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

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
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 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.…

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Learn about Sears Technical Institute and the advanced technical content being developed for aspiring appliance techs.…

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