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Maytag
Gas Water Heater

Model # HR640HOCT Official Maytag water heater

Here are the diagrams and repair parts for Official Maytag HR640HOCT 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 51 parts  |
Dip Tube 66001646
#23

Body diagram

Dip tube

Part #66001646

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

Pilot Assembly (both Standard & High Alt) 66001516
#5

Body diagram

Pilot assembly (both standard & high alt)

Part #66001516

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

Burner Head 66001511
#2A

Body diagram

Burner head

Part #66001511

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

Washer, Drai 66001021
#20B

Body diagram

Washer, drai

Part #66001021

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

Burner Head 66001494
#2

Body diagram

Burner head

Part #66001494

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

Anode Rod 66001725
#13

Body diagram

Anode rod

Part #66001725

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

Orifice, Burner (#50) (standard) 66001540
#3A

Body diagram

Orifice, burner (#50) (standard)

Part #66001540

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

Viewport Assembly 66001509
#21

Body diagram

Viewport assembly

Part #66001509

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

Orifice, Burner (#51) (both Standard & High Alt) 66001515
#3

Body diagram

Orifice, burner (#51) (both standard & high alt)

Part #66001515

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

Burner Tube 66001581
#4C

Body diagram

Burner tube

Part #66001581

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

Most common symptoms to help you fix your water heaters

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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

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