Amana
Furnace

Model # SU-125A3 Official Amana gas-fired upflow furnace

Here are the diagrams and repair parts for Official Amana SU-125A3 gas-fired upflow 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 197 parts  |

Furnace Blower Housing Assembly 980-1250
#3A

(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 housing assembly

Part #980-1250

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

Blower Shaft (1 Req.) 20-4198
#6

(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

Blower shaft (1 req.)

Part #20-4198

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

Mainfold Assembly (less Controls) 985-1164
#41B

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

Mainfold assembly (less controls)

Part #985-1164

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

Flue Outlet Pouch Gasket 22-2368
#45C

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

Flue outlet pouch gasket

Part #22-2368

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

Furnace Blower Belt, 40-in 20-2040
#16A

(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, 40-in

Part #20-2040

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

Mainfold Assembly (less Controls) 985-1173
#41C

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

Mainfold assembly (less controls)

Part #985-1173

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

Vestibule Panel Assembly 250-5000
#34A

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

Vestibule panel assembly

Part #250-5000

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

Mainfold Assembly (less Controls) 985-1184
#41D

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

Mainfold assembly (less controls)

Part #985-1184

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

Top Front Panel Assembly 252-1100
#29C

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

Top front panel assembly

Part #252-1100

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

Blower Motor W/48 Frame 1/3 H.p. 316p011 20-9130
#12B

(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

Blower motor w/48 frame 1/3 h.p. 316p011

Part #20-9130

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.

Main causes: loose drive clutch cable, damaged drive clutch cable, worn friction disc, scraper blade scraping the ground…

Main causes: dirty carburetor, clogged fuel filter, dirty spark plug, incorrect valve lash, leaky engine gaskets…

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

Things to do: replace the spark plug, change the oil, rebuild the carburetor, adjust valve lash, adjust or replace the b…

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

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

Main causes: dirty carburetor, stale fuel…

Main causes: clogged chute, snow build-up in auger housing, broken auger shear pins, auger drive belt needs adjustment, …

Main causes: broken shear pins, worn or loose auger drive belt, auger drive cable failure, damaged auger, bad gear case…

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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

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