Can’t find your part?   Contact us:
+1-309-603-4777
Sears Parts Direct
Orders

  • Keep track of the models you own in your profile

    Sign in or Register to view or add models

Schedule a repair
Amana
Furnace

Model # SU-125B4 Official Amana gas-fired upflow furnace

Here are the diagrams and repair parts for Official Amana SU-125B4 gas-fired upflow 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.

Model diagram and schematic

SEARCH WITHIN THIS MODEL

?

This is the number corresponding to the part on the diagram / schematic

Search
ALL PARTS
Showing 10 of 197 parts  |
Flue Outlet Pouch Gasket 22-2367
#45B

(su-75) (su-100) (su-125) (su-150) (su-175) (su-200) diagram

Flue outlet pouch gasket

Part #22-2367

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

Motor Capacitor, 5 Mfd - 440v 22-9603
#21B

(su-125ah) (su-125a3) (su-125a4) (su-125bh) (su-125b3) (su-125b4) (su-150ah) (su-150a3) (su-150a4) (su-150bh) (su-150b4) (su-150b5) (su-175bh) (su-175b4) (su-175b5) (su-200bh) (su-200b5) (su-200b6) diagram

Motor capacitor, 5 mfd - 440v

Part #22-9603

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

Blower Base Assembly - 9-9d 251-4851
#48E

(su-75) (su-100) (su-125) (su-150) (su-175) (su-200) diagram

Blower base assembly - 9-9d

Part #251-4851

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

Furnace Blower Belt, 37-in 20-2037
#16B

(su-125ah) (su-125a3) (su-125a4) (su-125bh) (su-125b3) (su-125b4) (su-150ah) (su-150a3) (su-150a4) (su-150bh) (su-150b4) (su-150b5) (su-175bh) (su-175b4) (su-175b5) (su-200bh) (su-200b5) (su-200b6) diagram

Furnace blower belt, 37-in

Part #20-2037

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

Base Assembly 254-4000
#30E

(su-75) (su-100) (su-125) (su-150) (su-175) (su-200) diagram

Base assembly

Part #254-4000

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

Top Front Panel Assembly 253-1100
#29D

(su-75) (su-100) (su-125) (su-150) (su-175) (su-200) diagram

Top front panel assembly

Part #253-1100

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

Vestibule Access Door Assembly 254-2750
#35E

(su-75) (su-100) (su-125) (su-150) (su-175) (su-200) diagram

Vestibule access door assembly

Part #254-2750

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

Bearing Cups - 3/4" Lau #7667 20-5025
#8

(su-125ah) (su-125a3) (su-125a4) (su-125bh) (su-125b3) (su-125b4) (su-150ah) (su-150a3) (su-150a4) (su-150bh) (su-150b4) (su-150b5) (su-175bh) (su-175b4) (su-175b5) (su-200bh) (su-200b5) (su-200b6) diagram

Bearing cups - 3/4" lau #7667

Part #20-5025

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

Blower Base Assembly - 10-8d 251-4852
#48C

(su-75) (su-100) (su-125) (su-150) (su-175) (su-200) diagram

Blower base assembly - 10-8d

Part #251-4852

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

Rear Panel Assembly 251-7000
#33B

(su-75) (su-100) (su-125) (su-150) (su-175) (su-200) diagram

Rear panel assembly

Part #251-7000

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

Effective articles & videos to help repair your furnaces

View all
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.…

Read more
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.…

Read more
Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…

Read more

Parts & More