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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

Pilot (lp) 66001194
#10A

Body diagram

Pilot (lp)

Part #66001194

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

Burner Orifice 66001041
#9C

Body diagram

Burner orifice

Part #66001041

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

Vent Cap Assembly 66001445
#24

Body diagram

Vent cap assembly

Part #66001445

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

Burner 66001185
#11A

Body diagram

Burner

Part #66001185

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

Burner Orifice 66001035
#9A

Body diagram

Burner orifice

Part #66001035

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

Burner Orifice 66001172
#9E

Body diagram

Burner orifice

Part #66001172

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

Nipple 66001311
#12

Body diagram

Nipple

Part #66001311

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

Plate, Adapt 66001240
#19

Body diagram

Plate, adapt

Part #66001240

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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