Can’t find your part?   Contact us:
+1-309-603-4777
Sears Parts Direct
Orders

  • Keep track of the models you own in your profile

    Sign in or Register to view or add models

Schedule a repair
Thermo-King
Water Heater

Model # 8-120-2ART8 Official Thermo-King electric water heater

Here are the diagrams and repair parts for Official Thermo-King 8-120-2ART8 electric water heater, as well as links to manuals and error code tables, if available.

There are a couple of ways to find the part or diagram you need:

  • Click a diagram to see the parts shown on that diagram.
  • In the search box below, enter all or part of the part number or the part’s name.

Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

We encourage you to save the model to your profile, so it’s easy to access parts and manuals for your appliance whenever you log in.

For DIY troubleshooting advice and repair guides, visit our repair help section.

Error Codes

Model diagram and schematic

SEARCH WITHIN THIS MODEL

?

This is the number corresponding to the part on the diagram / schematic

Search
ALL PARTS
Showing 10 of 22 parts  |
Access Bolt 9000928
#20

Round electric diagram

Access bolt

Part #9000928

This item is not returnable
$4.99
In Stock
Access Cover 9001764
#19

Round electric diagram

Access cover

Part #9001764

This item is not returnable
$5.99
In Stock
Access 9000927
#21

Round electric diagram

Access

Part #9000927

This item is not returnable
$4.99
In Stock
Thermostat 9000510
#7

Round electric diagram

Thermostat

Part #9000510

Replaced by #9001954015

?
Manufacturer substitution
This part replaces 9000510. Substitute parts can look different from the original.
$28.09 | 
18% OFF Phone Price : $34.09
In Stock
Thermostat 9000512
#11

Round electric diagram

Thermostat

Part #9000512

Replaced by #9000507015

?
Manufacturer substitution
This part replaces 9000512. Substitute parts can look different from the original.
$32.20 | 
16% OFF Phone Price : $38.20
In Stock
Light 9000325
#24

Round electric diagram

Light

Part #9000325

Replaced by #100108384

?
Manufacturer substitution
This part replaces 9000325. Substitute parts can look different from the original.
$30.00
In Stock
Anode Rod 9001672
#15

Round electric diagram

Anode rod

Part #9001672

Replaced by #100108660

?
Manufacturer substitution
This part replaces 9001672. Substitute parts can look different from the original.
$60.00
In Stock
Gasket 0530032
#22

Round electric diagram

Gasket

Part #0530032

Replaced by #9004099215

?
Manufacturer substitution
This part replaces 0530032. Substitute parts can look different from the original.
$51.99
In Stock
Access Panel 9000402
#5

Round electric diagram

Access panel

Part #9000402

Replaced by #9002644

?
Manufacturer substitution
This part replaces 9000402. Substitute parts can look different from the original.
$16.99
In Stock
Thermostat 9000523
#9A

Round electric diagram

Thermostat

Part #9000523

Replaced by #100108424

?
Manufacturer substitution
This part replaces 9000523. Substitute parts can look different from the original.
$30.00
In Stock

Most common symptoms to help you fix your water heaters

Choose a symptom to see related water heater repairs.

View all

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…

Read more

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…

Read more

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,…

Read more

Why does my hot water smell like rotten eggs?

Main causes: water supply needs chlorine treatment, anode rod too reactive…

Read more

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…

Read more

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…

Read more

Why is my water heater's pressure relief valve dripping water?

Main causes: faulty pressure relief valve, water is overheating…

Read more

Repair guides for electric water heaters

View all
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 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.…

Read more
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.

View all
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.…

Read more
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.…

Read more
Easy DIY water heater repairs

Easy DIY water heater repairs

Read about some water heater repairs that you can easily do yourself.…

Read more

Parts & More