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Maytag
Gas Water Heater

Model # HJ640NORSCGA Official Maytag water heater

Here are the diagrams and repair parts for Official Maytag HJ640NORSCGA 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  |
Tubing Pilot 66001277
#10A

Body diagram

Tubing pilot

Part #66001277

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

Manual, Use & Care (frch/eng) (non-illus) 66001126
#17

Body diagram

Manual, use & care (frch/eng) (non-illus)

Part #66001126

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

Gas Conversion Kit Valve 66001078
#14A

Body diagram

Gas conversion kit valve

Part #66001078

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

Anode Rod 66001157
#4

Body diagram

Anode rod

Part #66001157

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

Manifold 66001327
#12A

Body diagram

Manifold

Part #66001327

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

Burner Orifice 66001170
#11B

Body diagram

Burner orifice

Part #66001170

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

Washer, Drai 66001021
#7

Body diagram

Washer, drai

Part #66001021

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

Thermocouple 66001274
#9

Body diagram

Thermocouple

Part #66001274

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

Manifold 66001326
#12

Body diagram

Manifold

Part #66001326

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

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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