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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  |
Manifold 66001328
#12B

Body diagram

Manifold

Part #66001328

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

Gas Conversion Kit Valve 66001410
#14C

Body diagram

Gas conversion kit valve

Part #66001410

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

Draft Hood 66001032
#1

Body diagram

Draft hood

Part #66001032

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

Drain Valve 66001181
#6A

Body diagram

Drain valve

Part #66001181

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

Burner Orifice 66001161
#11

Body diagram

Burner orifice

Part #66001161

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

Natural Gas Pilot 66001023
#8

Body diagram

Natural gas pilot

Part #66001023

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

Drain Valve 66001016
#6

Body diagram

Drain valve

Part #66001016

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

Manifold 66001327
#12A

Body diagram

Manifold

Part #66001327

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 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 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

Wiring schematic symbols explained video

Learn some of the most common symbols found in a wiring diagram and what they mean.…

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Using a wiring schematic to trace a current video

Using a wiring schematic to trace a current video

Find out what’s wrong with your appliance by following a circuit.…

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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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