Gas Water Heater

Model # HJ640NBDS Official Maytag water heater

Here are the diagrams and repair parts for Official Maytag HJ640NBDS water heater, as well as links to manuals and error code tables, if available.

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Browse Parts for
HJ640NBDS Water Heaters
Collar Liner 9000723
#22

Body diagram

Collar liner

Part #9000723

Replaced by #66001213

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Manufacturer substitution
This part replaces 9000723. Substitute parts can look different from the original.
In Stock
Vent Cap Assembly 9000725
#24

Body diagram

Vent cap assembly

Part #9000725

Replaced by #66001215

?
Manufacturer substitution
This part replaces 9000725. Substitute parts can look different from the original.
In Stock
Vent Wall 9000724
#23

Body diagram

Vent wall

Part #9000724

Replaced by #66001214

?
Manufacturer substitution
This part replaces 9000724. Substitute parts can look different from the original.
In Stock
Burner Orifice 0230225
#9E

Body diagram

Burner orifice

Part #0230225

Replaced by #Y0230225

?
Manufacturer substitution
This part replaces 0230225. Substitute parts can look different from the original.
This item is not returnable
In Stock
Burner Orifice 0230223
#9C

Body diagram

Burner orifice

Part #0230223

Replaced by #Y0230223

?
Manufacturer substitution
This part replaces 0230223. Substitute parts can look different from the original.
This item is not returnable
In Stock
Dip Tube 66001279
#19A

Body (models with piezo ignitor) diagram

Dip tube

Part #66001279

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

Plate, Adapt 66001240
#23

Body (models with piezo ignitor) diagram

Plate, adapt

Part #66001240

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

Manifold 66001044
#7A

Body (models with piezo ignitor) diagram

Manifold

Part #66001044

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

Water Heater Temperature And Pressure Relief Valve 9000728
#13

Body diagram

Water heater temperature and pressure relief valve

Part #9000728

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

Access Door 66001206
#3

Body (models with piezo ignitor) diagram

Access door

Part #66001206

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: 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: faulty pressure relief valve, water is overheating…

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

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

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.

How to read a wiring schematic video

How to read a wiring schematic video

Learn how to decipher symbols so you can buy the right part for your problem.…

Easy DIY water heater repairs

Easy DIY water heater repairs

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

Water heater common questions

Water heater common questions

These common questions and answers can help you make the most of your water heater.…