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Maytag
Gas Water Heater

Model # HJ640PORSCGA Official Maytag water heater

Here are the diagrams and repair parts for Official Maytag HJ640PORSCGA 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 31 parts  |
Draft Hood 66001032
#1

Body diagram

Draft hood

Part #66001032

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

Manifold 66001377
#12C

Body diagram

Manifold

Part #66001377

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

Thermocouple 66001391
#9A

Body diagram

Thermocouple

Part #66001391

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

Flue Baffle 66001197
#2

Body diagram

Flue baffle

Part #66001197

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

Outer Door 66001190
#16

Body diagram

Outer door

Part #66001190

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

Temperature Valve 66001079
#5

Body diagram

Temperature valve

Part #66001079

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

Dip Tube 66001304
#3

Body diagram

Dip tube

Part #66001304

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

Inner Door 66001029
#15

Body diagram

Inner door

Part #66001029

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

Manifold 66001328
#12B

Body diagram

Manifold

Part #66001328

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

Tubing Pilot 66001276
#10

Body diagram

Tubing pilot

Part #66001276

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 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 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'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 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 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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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

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Water heater common questions

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