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Amana
Furnace

Model # OSCH-140-4 Official Amana oil furnace

Here are the diagrams and repair parts for Official Amana OSCH-140-4 oil 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 121 parts  |
Blower Mounting Angle B9236301
#2B

Replacement parts diagram

Blower mounting angle

Part #B9236301

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

Bearing Assembly M0875806
#45A

Replacement parts diagram

Bearing assembly

Part #M0875806

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

Flue Collar C9410903
#11C

Replacement parts diagram

Flue collar

Part #C9410903

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

Rear Blower Compartment Panel C9429102
#34B

Replacement parts diagram

Rear blower compartment panel

Part #C9429102

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

Blower Block-off B9230501
#49B

Replacement parts diagram

Blower block-off

Part #B9230501

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

Front Corner B9236901
#4B

Replacement parts diagram

Front corner

Part #B9236901

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

Filter Rack Front B9236701
#4D

Replacement parts diagram

Filter rack front

Part #B9236701

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

Blower Block-off B9230601
#49D

Replacement parts diagram

Blower block-off

Part #B9230601

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

Front Left Gusset B9239901
#22A

Replacement parts diagram

Front left gusset

Part #B9239901

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

Rear Left Gusset B9240101
#29A

Replacement parts diagram

Rear left gusset

Part #B9240101

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

Symptoms for gas pressure washers

Choose a symptom to see related pressure washer repairs.

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Why won't my pressure washer mix in the detergent?

Main causes: using a high-pressure spray tip when applying detergent, clogged siphon tube, chemical injection system fai…

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Why is smoke coming from the pressure washer's exhaust?

Main causes: overfilling engine with oil, improper fuel/air mixture, choke system problems, dirty carburetor, engine nee…

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Why won't the pressure washer starter rope retract?

Main causes: broken recoil spring, damaged recoil starter…

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Why does my pressure washer's engine lose power?

Main causes: dirty air filter, stale fuel, clogged or dirty carburetor, bad unloader valve…

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Why is the spray from my pressure washer weak?

Main causes: insufficient water supply, clogged water inlet screen, clogged pressure hose, faulty pump check valves, stu…

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Why doesn't my pressure washer recoil starter work?

Main causes: damaged recoil starter, oil inside cylinder, locked up engine piston…

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Why does my pressure washer spray too hard?

Main causes: faulty unloader valve, bad pressure regulator…

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Why won't my pressure washer engine start?

Main causes: stale fuel, gummed up carburetor, engine needs tune up, throttle and choke controls need adjustment, bad re…

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Why does water spray out of my pressure washer's pressure relief valve?

Main causes: pump running for more than 5 minutes when the spray wand isn't being used, faulty pressure relief valve, ba…

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Repair guides for gas pressure washers

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

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How to install a pressure washer check valve kit

How to install a pressure washer check valve kit

Air in the inlet water supply can damage the check valves. If the pump won’t build up pressure due to damaged check valv…

Read more
Repair difficulty
Time required
 120 minutes or less
How to install a pressure washer O-ring kit

How to install a pressure washer O-ring kit

O-rings seal fittings on the pressure washer pump. Damaged seals allow water to leak from the pump. Follow these steps t…

Read more
Repair difficulty
Time required
 45 minutes or less
How to install a pressure washer chemical injection kit

How to install a pressure washer chemical injection kit

The chemical injection valve draws detergent into the pump. If it’s not drawing detergent, use a repair kit to replace t…

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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 pressure washer.

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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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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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