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Maytag
Gas Water Heater

Model # HJ640NBDSCGA Official Maytag water heater

Here are the diagrams and repair parts for Official Maytag HJ640NBDSCGA 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 44 parts  |
Gasket, Adap 66001238
#18

Body diagram

Gasket, adap

Part #66001238

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

Burner 66001185
#11A

Body diagram

Burner

Part #66001185

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

Flue Baffle 66001234
#16

Body diagram

Flue baffle

Part #66001234

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

Collar Liner 66001446
#22

Body diagram

Collar liner

Part #66001446

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

Clips, Jacke 66001242
#5A

Body diagram

Clips, jacke

Part #66001242

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

Thermostat 66001183
#3A

Body diagram

Thermostat

Part #66001183

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

Thermostat 66001004
#3

Body diagram

Thermostat

Part #66001004

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

Manifold 66001044
#6A

Body diagram

Manifold

Part #66001044

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

Burner Orifice 66001025
#9

Body diagram

Burner orifice

Part #66001025

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

Burner Orifice 66001159
#9D

Body diagram

Burner orifice

Part #66001159

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 does my hot water smell like rotten eggs?

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

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

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

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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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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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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.…

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Easy DIY water heater repairs

Easy DIY water heater repairs

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

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Water heater common questions

Water heater common questions

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

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