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Thermar
Gas Water Heater

Model # PM1000LP Official Thermar tankless water heater

Here are the diagrams and repair parts for Official Thermar PM1000LP 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  |
Manifold Assembly 239-37342-00
#12

Replacement parts diagram

Manifold assembly

Part #239-37342-00

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

Blade Assembly 239-37327-00
#9

Replacement parts diagram

Blade assembly

Part #239-37327-00

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

Valve Body 239-37381-00
#23

Replacement parts diagram

Valve body

Part #239-37381-00

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

Sensing Tube 239-37332-00
#25

Replacement parts diagram

Sensing tube

Part #239-37332-00

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

Ht Exch Assy 239-37373-00
#3

Replacement parts diagram

Ht exch assy

Part #239-37373-00

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

Igniter 239-37337-00
#30

Replacement parts diagram

Igniter

Part #239-37337-00

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

Flange 239-37347-00
#5

Replacement parts diagram

Flange

Part #239-37347-00

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

Valve Assembly 239-37345-00
#17

Replacement parts diagram

Valve assembly

Part #239-37345-00

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

Ig Button 239-37334-00
#31

Replacement parts diagram

Ig button

Part #239-37334-00

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

Most common symptoms to help you fix your water heaters

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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 does my hot water smell like rotten eggs?

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

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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 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 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 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 enough hot water?

Main causes: broken heating element, thermostat failure, excessive tank sediment, tank size too small, burner valve asse…

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