AO Smith
Gas Water Heater

Model # GPDX75100 Official AO Smith water heater

Here are the diagrams and repair parts for Official AO Smith GPDX75100 water heater, 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 46 parts  |

Inlet Tube 183901-040
#13A

Water heater diagram

Inlet tube

Part #183901-040

Replaced by #9002432005

?
Manufacturer substitution
This part replaces 183901-040. Substitute parts can look different from the original.
In Stock
Nipple 184633-002
#NI

Water heater diagram

Nipple

Part #184633-002

Replaced by #100108409

?
Manufacturer substitution
This part replaces 184633-002. Substitute parts can look different from the original.
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

Anode Rod 183523-039
#14

Water heater diagram

Anode rod

Part #183523-039

Replaced by #100109594

?
Manufacturer substitution
This part replaces 183523-039. Substitute parts can look different from the original.
In Stock
Dip Tube 183900-028
#13

Water heater diagram

Dip tube

Part #183900-028

Replaced by #9003667005

?
Manufacturer substitution
This part replaces 183900-028. Substitute parts can look different from the original.
In Stock
Gasket 0010100190
#11

Water heater diagram

Gasket

Part #0010100190

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

Manifold 184323-002
#22A

Water heater diagram

Manifold

Part #184323-002

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

Gasket 0005301040
#8

Water heater diagram

Gasket

Part #0005301040

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

Door Clip 0002400720
#25A

Water heater diagram

Door clip

Part #0002400720

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.

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

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

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

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

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

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

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

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.

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.…

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.…

Easy DIY water heater repairs

Easy DIY water heater repairs

Read about some water heater repairs that you can easily do yourself.…