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AO Smith
Gas Water Heater

Model # GPDH50100 Official AO Smith water heater

Here are the diagrams and repair parts for Official AO Smith GPDH50100 water heater, as well as links to manuals and error code tables, if available.

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Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

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Error Codes

Model diagram and schematic

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ALL PARTS
Showing 10 of 39 parts  |
Nipple 184633-002
#NI

Water heater diagram

Nipple

Part #184633-002

Replaced by #9000415015

?
Manufacturer substitution
This part replaces 184633-002. Substitute parts can look different from the original.
This item is not returnable
$18.39 | 
10% OFF Phone Price : $20.39
In Stock
Anode Rod 183523-029
#14

Water heater diagram

Anode rod

Part #183523-029

Replaced by #9003944005

?
Manufacturer substitution
This part replaces 183523-029. Substitute parts can look different from the original.
$36.22 | 
12% OFF Phone Price : $41.22
In Stock
Temperature Valve 043151-000
#12

Water heater diagram

Temperature valve

Part #043151-000

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

Door 0003901050
#20

Water heater diagram

Door

Part #0003901050

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

Door Clip 0002400720
#25A

Water heater diagram

Door clip

Part #0002400720

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

Door 0015123490
#23

Water heater diagram

Door

Part #0015123490

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

Switch 0001804500
#9

Water heater diagram

Switch

Part #0001804500

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

Ac Cord 181345-000
#28

Water heater diagram

Ac cord

Part #181345-000

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

Ignition 184047-000
#17

Water heater diagram

Ignition

Part #184047-000

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

Vent Hood 0015143280
#10

Water heater diagram

Vent hood

Part #0015143280

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

Most common symptoms to help you fix your water heaters

Choose a symptom to see related water heater repairs.

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Why isn't my water heater making the water hot enough?

Main causes: thermostats need adjustment, water heater capacity too low, bad heating element, thermostat failure, excess…

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Why is there water in my water heater's drain pan?

Main causes: loose water pipe fittings, leaky drain valve, bad temperature-pressure relief valve, leaky heating element,…

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Why does my hot water smell like rotten eggs?

Main causes: water supply needs chlorine treatment, anode rod too reactive…

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Why isn't my water heater heating my water?

Main causes: lack of power, no gas supply, thermostat limit switch tripped, bad element, bad thermostat, gas valve failu…

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Why isn't my water heater making enough hot water?

Main causes: broken heating element, thermostat failure, excessive tank sediment, tank size too small, burner valve asse…

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Why is my water heater making the water too hot?

Main causes: thermostat temperature set too high, thermostats need adjustment, faulty thermostat, shorted heating elemen…

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Why is my water heater's pressure relief valve dripping water?

Main causes: faulty pressure relief valve, water is overheating…

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Effective articles & videos to help repair your water heaters

Use the advice and tips in these articles and videos to get the most out of your water heater.

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Wiring schematic symbols explained video

Wiring schematic symbols explained video

Learn some of the most common symbols found in a wiring diagram and what they mean.…

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Using a wiring schematic to trace a current video

Using a wiring schematic to trace a current video

Find out what’s wrong with your appliance by following a circuit.…

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Easy DIY water heater repairs

Easy DIY water heater repairs

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