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Maytag
Electric Water Heater

Model # HM340DHMSE3 Official Maytag electric water heater

Here are the diagrams and repair parts for Official Maytag HM340DHMSE3 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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Access Panel 66001199
Access panel

Part #66001199

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

Terminal Cover 66001064
#20

Body diagram

Terminal cover

Part #66001064

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

Amana Room Air Conditioner NLA
Amana room air conditioner

Part #NLA

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

Element Gasket 66001053
Element gasket

Part #66001053

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

Use And Care Manual 66001715
#22

Body diagram

Use and care manual

Part #66001715

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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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…

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Repair difficulty
Time required
 30 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
How to replace a water heater temperature and pressure (T&P) relief valve

How to replace a water heater temperature and pressure (T&P) relief valve

Replace a broken temperature/pressure (T&P) relief valve on an electric water heater using these instructions.…

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Repair difficulty
Time required
 15 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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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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