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Thermar
Gas Water Heater

Model # TL200 Official Thermar tankless water heater

Here are the diagrams and repair parts for Official Thermar TL200 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 34 parts  |
O-ring 20-12335
#27

Gas burners and manifold diagram

O-ring

Part #20-12335

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

Insert 10-13846
#14

Gas burners and manifold diagram

Insert

Part #10-13846

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

Av Assy N 10-12458
#13

Gas burners and manifold diagram

Av assy n

Part #10-12458

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

Chassis Seal 10-10062
#1B

Combustion chamber and cabinet diagram

Chassis seal

Part #10-10062

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

Sensing Tube 10-13495
#26

Gas burners and manifold diagram

Sensing tube

Part #10-13495

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

Cover Assembly 10-14784
#7

Combustion chamber and cabinet diagram

Cover assembly

Part #10-14784

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

Housing Assembly 10-13561
#16

Gas burners and manifold diagram

Housing assembly

Part #10-13561

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

In/fil Assy 10-12873
#20A

Gas burners and manifold diagram

In/fil assy

Part #10-12873

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

Connection 10-13849
#19

Gas burners and manifold diagram

Connection

Part #10-13849

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

Igniter 10-11935
#21

Gas burners and manifold diagram

Igniter

Part #10-11935

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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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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