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Maytag
Gas Water Heater

Model # HR640YOCT Official Maytag water heater

Here are the diagrams and repair parts for Official Maytag HR640YOCT 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

Shield, Thermostat 66001667
#19

Body diagram

Shield, thermostat

Part #66001667

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

Burner Assembly 66001637
#1G

Body diagram

Burner assembly

Part #66001637

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

Burner Assembly 66001633
#1D

Body diagram

Burner assembly

Part #66001633

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

Gas Control Valve 66001576
#18C

Body diagram

Gas control valve

Part #66001576

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

Valve, T & P Relief 66001682
#14

Body diagram

Valve, t & p relief

Part #66001682

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

Valve, T & P Relief 66001762
#14B

Body diagram

Valve, t & p relief

Part #66001762

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

Igniter, Piezo (w/bracket) 66001507
#17

Body diagram

Igniter, piezo (w/bracket)

Part #66001507

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

Burner Assembly 66001625
#1A

Body diagram

Burner assembly

Part #66001625

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

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Water heater common questions

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