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Maytag
Electric Water Heater

Model # HM340DHMSE4 Official Maytag electric water heater

Here are the diagrams and repair parts for Official Maytag HM340DHMSE4 electric 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 16 parts  |
Thermostat 66001254
#19

Body diagram

Thermostat

Part #66001254

Replaced by #9001954015

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Manufacturer substitution
This part replaces 66001254. Substitute parts can look different from the original.
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Temperature Valve 66001079
#3

Body diagram

Temperature valve

Part #66001079

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

Bracket, The 66001054
Bracket, the

Part #66001054

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

Junction Cover 66001408
#4

Body diagram

Junction cover

Part #66001408

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

Element (380 66001417
Element (380

Part #66001417

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

Washer, Drai 66001021
#13

Body diagram

Washer, drai

Part #66001021

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

Drain Valve 66001420
#12

Body diagram

Drain valve

Part #66001420

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

Thermostat 66001201
#8

Body diagram

Thermostat

Part #66001201

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

Anode, Prima 66001252
#1

Body diagram

Anode, prima

Part #66001252

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

Outlet Nippl 66001416
#2

Body diagram

Outlet nippl

Part #66001416

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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Repair guides for electric water heaters

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How to replace a water heater element

How to replace a water heater element

If your water heater runs out of hot water quickly and one of the two heating elements has failed, replace the element f…

Read more
Repair difficulty
Time required
 30 minutes or less
How to replace an electric water heater anode rod

How to replace an electric water heater anode rod

If your hot water begins to smell like rotten eggs, replace the anode rod with a zinc-aluminum anode rod following the i…

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace an electric water heater thermostat

How to replace an electric water heater thermostat

If the water temperature fluctuates or you don't get enough hot water, follow these instructions to replace your water h…

Read more
Repair difficulty
Time required
 30 minutes or less

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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