Gas Water Heater

Model #GS640YOCT200 Official State water heater

Here are the diagrams and repair parts for State GS640YOCT200 water heater, as well as links to manuals and error code tables, if available.

There are a couple of ways to find the part or diagram you need:

  • Click a diagram to see the parts shown on that diagram.
  • In the search box below, enter all or part of the part number or the part’s name.

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

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For DIY troubleshooting advice and repair guides, visit our repair help section.

Error Codes

Showing 10 of 21 parts

Water Heater Manifold Door and Burner Assembly#NI

Water heater Diagram

In Stock
$100.67 | 
9% OFF 
Phone Price: $110.67
Water Heater Thermocouple (replaces 194621, 6900725, 9000056, 9002322)#NI

Water heater Diagram

In Stock
$21.99 | 
19% OFF 
Phone Price: $26.99
Water Heater Anode Rod (replaces 183523-033, 183523-036, 183523-039, 183523-042, 183523-33, 183523-36, 183523-48, 4700276, 9003889, 9003892, 9004092, 9004335005)#6

Water heater Diagram

Water Heater Pilot Assembly#NI

Water heater Diagram

In Stock
$28.99 | 
15% OFF 
Phone Price: $33.99
Water Heater Piezo Igniter Generator with Bracket#NI

Water heater Diagram

In Stock
$19.29 | 
9% OFF 
Phone Price: $21.29

Water heater Diagram


Part #9000275015
In Stock
Inlet Tube#5

Water heater Diagram

Inlet tube

Part #9006690005
In Stock
Water Heater Manifold Wire Connector#NI

Water heater Diagram

In Stock
Water Heater Burner Access Door#11

Water heater Diagram

Water heater burner access door

Part #9006648005
This item is not returnable
In Stock
$17.79 | 
10% OFF 
Phone Price: $19.79

Water heater Diagram


Part #9006616005
In Stock

Symptoms common to all water heaters

Choose a symptom to see related water heater repairs.

Main causes: lack of power, no gas supply, thermostat limit switch tripped, bad element, bad thermostat, gas valve failure, bad thermocouple
Main causes: water supply needs chlorine treatment, anode rod too reactive
Main causes: thermostats need adjustment, water heater capacity too low, bad heating element, thermostat failure, excessive tank sediment
Main causes: thermostat temperature set too high, thermostats need adjustment, faulty thermostat, shorted heating element
Main causes: faulty pressure relief valve, water is overheating
Main causes: broken heating element, thermostat failure, excessive tank sediment, tank size too small, burner valve assembly failure
Main causes: loose water pipe fittings, leaky drain valve, bad temperature-pressure relief valve, leaky heating element, cracked tank

Articles and videos common to all water heaters

Use the advice and tips in these articles and videos to get the most out of your water heater.

October 24, 2022

Easy DIY appliance repairs that anyone can do

By Lyle Weischwill

Get advice on simple DIY fixes for appliances that you can safely do on your own.

April 10, 2020

Cleaning your appliances after a drinking water advisory

By Wayne Archer

Find out how to clean and flush household appliances once a boil water advisory is lifted.

August 1, 2015

Easy DIY water heater repairs

By Lyle Weischwill

Read about some water heater repairs that you can easily do yourself.