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Maytag
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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Error Codes

Model diagram and schematic

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ALL PARTS
Showing 10 of 88 parts  |
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.
$89.25
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
$3.29
In Stock
Collar Liner 9000723
#22

Body diagram

Collar liner

Part #9000723

Replaced by #66001213

?
Manufacturer substitution
This part replaces 9000723. Substitute parts can look different from the original.
$34.31
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.
$128.83
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
$3.33
In Stock
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

Thermocouple 9000876
#7

Body diagram

Thermocouple

Part #9000876

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

Burner Orifice 66001159
#4D

Body (models with piezo ignitor) diagram

Burner orifice

Part #66001159

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

Plate, Adapt 9001293
#19

Body diagram

Plate, adapt

Part #9001293

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

Washer, Drai 66001021
#13

Body (models with piezo ignitor) diagram

Washer, drai

Part #66001021

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

Most common symptoms to help you fix your water heaters

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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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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 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

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