Model # GD072K12A Official Thermal Zone gas furnace

Here are the diagrams and repair parts for Official Thermal Zone GD072K12A 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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Showing 10 of 29 parts |

#27

80+ downflow furnace diagram

Furnace electronic control board

Part #903106

$297.66

In Stock

Qty

#21

80+ downflow furnace diagram

Blower wheel

Part #667251

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

#20

80+ downflow furnace diagram

Nordyne limit switch

Part #626419

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

80+ downflow furnace diagram

Sensor rod

Part #632316

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

80+ downflow furnace diagram

Gas valve

Part #624586

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

#26

80+ downflow furnace diagram

Transformer

Part #621486

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

#19

80+ downflow furnace diagram

Switch

Part #632212

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

80+ downflow furnace diagram

Main burner ofrifice (43 drill) (not shown)

Part #661043

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

Gasket, Collector Pan (not Shown) (replace Gasket Whenever Collector Pan Assembly (item 11) Is Removed) 689531

#12

80+ downflow furnace diagram

Gasket, collector pan (not shown) (replace gasket whenever collector pan assembly (item 11) is removed)

Part #689531

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

80+ downflow furnace diagram

Complete burner assembly

Part #D03592

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

Symptoms for gas snowblowers

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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 throw snow far enough?

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

Why does my snowblower stop running after a few seconds?

Main causes: dirty carburetor, stale fuel…

What should I do about a damaged snowblower tire?

Main causes: punctured tire, damaged rim…

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 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 chute turn?

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

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, …

Repair guides for gas snowblowers

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

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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.

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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 # GD072K12A Official Thermal Zone gas furnace

Model diagram and schematic

SEARCH WITHIN THIS MODEL

Symptoms for gas snowblowers

How do I tune up my snowblower?

Why won't my snowblower throw snow far enough?

Why does my snowblower stop running after a few seconds?

What should I do about a damaged snowblower tire?

Why does my snowblower engine run rough?

Why won't my snowblower start?

Why doesn't my snowblower self propel?

Why won't my snowblower chute turn?

Why won't my snowblower clear snow well?

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

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