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Reliance
Gas Water Heater

Model # 640CODS Official Reliance water heater

Here are the diagrams and repair parts for Official Reliance 640CODS 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 54 parts  |
Door 9000696
#3

Water heater diagram

Door

Part #9000696

$57.99
In Stock
Flue Pipe 9001285
#40

Venting diagram

Flue pipe

Part #9001285

$33.99
In Stock
Vent Pipe 9001277
#27

Venting diagram

Vent pipe

Part #9001277

This item is not returnable
$4.99
In Stock
Vent Pipe 9001278
#35

Venting diagram

Vent pipe

Part #9001278

This item is not returnable
$7.49
In Stock
Collar Assembly 9000724
#55

Venting diagram

Collar assembly

Part #9000724

$9.49
In Stock
Vent Pipe 9001275
#33

Venting diagram

Vent pipe

Part #9001275

This item is not returnable
$5.99
In Stock
Vent Pipe 9001279
#41

Venting diagram

Vent pipe

Part #9001279

$11.99
In Stock
Flue Pipe 9001281
#32

Venting diagram

Flue pipe

Part #9001281

$24.99
In Stock
State Flue Baffle 9000709
#18

Water heater diagram

State flue baffle

Part #9000709

$18.49
In Stock
Jacket Clips 9001305
#13

Venting diagram

Jacket clips

Part #9001305

This item is not returnable
$2.99
In Stock

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

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