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Reliance
Gas Water Heater

Model # 640HJRS103 Official Reliance water heater

Here are the diagrams and repair parts for Official Reliance 640HJRS103 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 19 parts  |
Water Heater Manifold Door Gasket 9006141015
#NI

Water heater diagram

Water heater manifold door gasket

Part #9006141015

$25.49 | 
19% OFF Phone Price : $31.49
In Stock
Water Heater Burner (replaces 100111320) 9006603005
#NI

Water heater diagram

Water heater burner (replaces 100111320)

Part #9006603005

$48.83
In Stock
State Gas Control 9006606005
#NI

Water heater diagram

State gas control

Part #9006606005

$202.90
In Stock
Window Assembly 9006142015
#NI

Water heater diagram

Window assembly

Part #9006142015

$17.99
In Stock
State Water Heater Gas Control Valve 9006604005
#8

Water heater diagram

State water heater gas control valve

Part #9006604005

$228.86
In Stock
Drain Valve 9003906015
#6

Water heater diagram

Drain valve

Part #9003906015

Replaced by #9009086015

?
Manufacturer substitution
This part replaces 9003906015. Substitute parts can look different from the original.
$19.49
In Stock
Anode Rod 9003721005
#1A

Water heater diagram

Anode rod

Part #9003721005

Replaced by #100109434

?
Manufacturer substitution
This part replaces 9003721005. Substitute parts can look different from the original.
$36.67
In Stock
Dip Tube 9006131005
#4

Water heater diagram

Dip tube

Part #9006131005

Replaced by #100110924

?
Manufacturer substitution
This part replaces 9006131005. Substitute parts can look different from the original.
$24.44
In Stock
Water Heater Thermocouple (replaces 194621, 6900725, 9000056, 9002322) 9000056015
#NI

Water heater diagram

Water heater thermocouple (replaces 194621, 6900725, 9000056, 9002322)

Part #9000056015

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

Ring 9006129005
#18

Water heater diagram

Ring

Part #9006129005

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

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Using a wiring schematic to trace a current video

Using a wiring schematic to trace a current video

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Easy DIY water heater repairs

Easy DIY water heater repairs

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