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Reliance
Gas Water Heater

Model # 640HCRS103 Official Reliance water heater

Here are the diagrams and repair parts for Official Reliance 640HCRS103 water heater, as well as links to manuals and error code tables, if available.

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Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

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Error Codes

Model diagram and schematic

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Showing 10 of 19 parts  |
Water Heater Thermocouple (replaces 194621, 6900725, 9000056, 9002322) 9000056015
#NI

Water heater diagram

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

Part #9000056015

BEST SELLER
$17.72 | 
10% OFF Phone Price : $19.72
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
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 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 9003944005
#1

Water heater diagram

Anode rod

Part #9003944005

Replaced by #100109624

?
Manufacturer substitution
This part replaces 9003944005. Substitute parts can look different from the original.
$31.11
In Stock
Water Heater Temperature And Pressure Relief Valve (replaces 9007483005) 9000728015
#19

Water heater diagram

Water heater temperature and pressure relief valve (replaces 9007483005)

Part #9000728015

Replaced by #100108455

?
Manufacturer substitution
This part replaces 9000728015. Substitute parts can look different from the original.
$35.56
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

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