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Reliance
Gas Water Heater

Model # 640YJRS102 Official Reliance water heater

Here are the diagrams and repair parts for Official Reliance 640YJRS102 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

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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 100110929) 9006136005
#NI

Water heater diagram

Water heater burner (replaces 100110929)

Part #9006136005

$23.93 | 
20% OFF Phone Price : $29.93
In Stock
Water Heater Manifold Door Assembly 9006138005
#NI

Water heater diagram

Water heater manifold door assembly

Part #9006138005

$165.99
In Stock
Window Assembly 9006142015
#NI

Water heater diagram

Window assembly

Part #9006142015

$17.99
In Stock
Water Heater Gas Control Valve 9006432005
#8

Water heater diagram

Water heater gas control valve

Part #9006432005

$98.24 | 
11% OFF Phone Price : $110.24
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
Water Heater Pilot Assembly (replaces 6910427) 9006134015
#NI

Water heater diagram

Water heater pilot assembly (replaces 6910427)

Part #9006134015

Replaced by #100110927

?
Manufacturer substitution
This part replaces 9006134015. Substitute parts can look different from the original.
$58.89
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

Most common symptoms to help you fix your water heaters

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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?

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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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