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Directory: Catalog > Water
Heaters > A.O. Smith > Parts
Parts List: A.O. Smith GDHE-50, Series 120/121
- Use the chart to find the part you need to order. A diagram of the unit is below the chart to assist you in locating your part.
- Click on the underlined link to go directly to the part's page for pricing and ordering.
- For parts that are not underlined and do not have a link, please Contact Us for price and availability.
- The manufacturer has changed some part numbers to a new part number, and we have referenced the new part number in the chart (if applicable). Please note that the manufacturer may change part numbers and availability at any time.
- You can download and print the original PDF of the A.O. Smith parts list at the bottom of the page.
| Item |
Description |
GDHE-50
Series 120/121
|
| 1 |
Display Circuit Board |
9006240005 |
| 2 |
Power Switch |
9005980205 |
| 3 |
Plastic Top |
9005977205 |
| 4 |
Plastic Enclosure |
9006413005 |
| 5 |
Display Overlay (Button Pad) |
9006415005 |
| 6 |
T & P Valve |
9000728015 |
| 7 |
Drain Valve |
9003906015 |
| 8 |
T & P Outlet Tube (Canadian Models Only) |
700340-004 |
NOTES:
- The manufacturer may change part numbers and availability at any time. |
Top Cover Control Assembly:
| Item |
Description |
GDHE-50
120 Series
Natural Gas
|
GDHE-50
121 Series
Propane
|
| 1 |
CCB (Central Control Board) with Enclosure |
9007140005 |
9007141005 |
| 2 |
Blcoked Exhaust Switch |
9006282015 |
9006282015 |
| 3 |
Blocked Intake Air Switch |
9005972215 |
9005972215 |
| 4 |
Blower Prover Switch |
9006280015 |
9006280015 |
| 5* |
Temperature Probe |
9004238215 |
9004238215 |
| 6 |
Anode - Aluminum |
9003892005 |
9003892005 |
| 6A |
Anode - Magnesium |
9001829005 |
9001829005 |
| 7 |
Inlet Tube |
9006422005 |
9006422005 |
| 8 |
Inlet Nipple |
9003936015 |
9003936015 |
| 9 |
Anode - Outlet Aluminum |
9006659005 |
9006659005 |
| 9A |
Anode - Outlet Magnesium |
9004333005 |
9004333005 |
NOTES:
- The manufacturer may change part numbers and availability at any time.
* Not shown. Located under side front cover. |
Blower / Burner Assembly:
| Item |
Description |
GDHE-50
120 Series
Natural Gas
|
GDHE-50
121 Series
Propane
|
| 1 |
Blower |
9006423005 |
9006423005 |
| 2 |
Burner Gasket |
9007437015 |
9007437015 |
| 3 |
Burner Assembly |
9006970005 |
9006970005 |
| 4 |
Gas Valve / Venturi Assembly |
9006425005 |
9006426005 |
| 5 |
Observation Window |
9006102215 |
9006102215 |
| 6 |
Burner Adaptor Gasket |
9007138005 |
9007138005 |
| 7 |
Ignitor |
9006968005 |
9006968005 |
| 8 |
Flame Sensor Rod |
9007229005 |
9007229005 |
| 9 |
Wire Harness |
9006969005 |
9006969005 |
| 10 |
Machine Screw (#6-32 x 0.25 in. L Pan Head) |
----- |
----- |
| 11 |
Socket Button Head Cap Screw (#10-32 x 5/8 in. L Full Thread) |
----- |
----- |
| 12 |
Socket Head Cap Screw (5/16-18 x 5/8 in. L) |
----- |
----- |
NOTES:
- The manufacturer may change part numbers and availability at any time. |
Direct Vent Kit for Cold Climate, Exhaust Elbow Assembly:
| Description |
GDHE-50
Series
120/121
|
| 2 in. Direct Vent Kit, ULC S636 Compliant |
318221-000 |
| 3 in. Direct Vent Kit, ULC S636 Compliant |
318222-000 |
| Standard Exhaust Elbow Assembly |
9006428005 |
| ULC S636 Compliant Exhaust Elbow Assembly |
9006785005 |
NOTES:
- The manufacturer may change part numbers and availability at any time. |
Download original AO Smith Parts List
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