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Thermar
Electric Water Heater

Model # K-I-0I-10M Official Thermar tankless water heater

Here are the diagrams and repair parts for Official Thermar K-I-0I-10M tankless 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 39 parts  |
Stop Button 239-3733-00
#33

Replacement parts diagram

Stop button

Part #239-3733-00

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

Housing Assembly 239-37320-00
#18

Replacement parts diagram

Housing assembly

Part #239-37320-00

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

Eco Assy 239-37317-00
#20

Replacement parts diagram

Eco assy

Part #239-37317-00

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

Buter Case PM-12
#8

Replacement parts diagram

Buter case

Part #PM-12

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

Thermocouple 239-37326-00
#13

Replacement parts diagram

Thermocouple

Part #239-37326-00

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

Gasket 239-37368-00
#16

Replacement parts diagram

Gasket

Part #239-37368-00

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

Electrode 239-37318-00
#15

Replacement parts diagram

Electrode

Part #239-37318-00

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

Control Valve 239-37319-00
#14

Replacement parts diagram

Control valve

Part #239-37319-00

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

Start Button 239-37321-00
#32

Replacement parts diagram

Start button

Part #239-37321-00

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

Pilot Assembly 239-37380-00
#28

Replacement parts diagram

Pilot assembly

Part #239-37380-00

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…

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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…

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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…

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Repair difficulty
Time required
 30 minutes or less

Effective articles & videos to help repair your water heaters

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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

Water heater common questions

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