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Maytag
Gas Water Heater

Model # HM340NHDST Official Maytag gas water heater

Here are the diagrams and repair parts for Official Maytag HM340NHDST gas 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 40 parts  |
Gas Conversion Kit Valve 66001457
#17

Body diagram

Gas conversion kit valve

Part #66001457

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

Blower Gasket 66001405
#23

Body diagram

Blower gasket

Part #66001405

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

Burner Orifice 66001434
#14D

Body diagram

Burner orifice

Part #66001434

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

Use And Care Manual 66001438
#27

Body diagram

Use and care manual

Part #66001438

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

Manifold 66001026
#15

Body diagram

Manifold

Part #66001026

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

Burner 66001027
#16

Body diagram

Burner

Part #66001027

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

Thermocouple 66001273
#12

Body diagram

Thermocouple

Part #66001273

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

Flue Baffle 66001454
#6

Body diagram

Flue baffle

Part #66001454

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

Drain Pan 66001011
#25

Body diagram

Drain pan

Part #66001011

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

Brackets Motor 66001431
#5

Body diagram

Brackets motor

Part #66001431

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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