Can’t find your part?   Contact us:
+1-309-603-4777
Sears Parts Direct
Orders

  • Keep track of the models you own in your profile

    Sign in or Register to view or add models

Schedule a repair
Rheem
Gas Water Heater

Model # 44X40-1 Official Rheem 40-gallon gas water heater

Here are the diagrams and repair parts for Official Rheem 44X40-1 40-gallon gas 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”.

We encourage you to save the model to your profile, so it’s easy to access parts and manuals for your appliance whenever you log in.

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

Error Codes

Model diagram and schematic

SEARCH WITHIN THIS MODEL

?

This is the number corresponding to the part on the diagram / schematic

Search
ALL PARTS
Showing 10 of 17 parts  |
Thrmcouple AP-6379-F
#6

Thermostat and burner diagram

Thrmcouple

Part #AP-6379-F

Replaced by #H06E-36

?
Manufacturer substitution
This part replaces AP-6379-F. Substitute parts can look different from the original.
This item is not returnable
$14.52 | 
12% OFF Phone Price : $16.52
In Stock
Burner AP-8980-C
#5A

Thermostat and burner diagram

Burner

Part #AP-8980-C

Replaced by #SP8980C

?
Manufacturer substitution
This part replaces AP-8980-C. Substitute parts can look different from the original.
$37.60
In Stock
Burner Air Shutter AS-25789
#8

Liquefied petroleum gas models (with cast iron burner) diagram

Burner air shutter

Part #AS-25789

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

Thermostat, Natural Gas AP-8555-F
#1

Thermostat and burner diagram

Thermostat, natural gas

Part #AP-8555-F

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

Orifice, Burner (l.p. Gas) (when Ordering This Part, The Model, Type Of Gas, And Serial Number Must Be Included) AP-7492
Orifice, burner (l.p. gas) (when ordering this part, the model, type of gas, and serial number must be included)

Part #AP-7492

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

Pilot Supply Tube AS-35137-H
#4

Thermostat and burner diagram

Pilot supply tube

Part #AS-35137-H

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

Burner AS-36335A
#3A

Thermostat and burner diagram

Burner

Part #AS-36335A

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

Pilot Supply Tube AE-36159
#4

Liquefied petroleum gas models (with cast iron burner) diagram

Pilot supply tube

Part #AE-36159

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

Pilot Burner, Natural Gas AS-8980-B
#5

Thermostat and burner diagram

Pilot burner, natural gas

Part #AS-8980-B

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

Thermocouple AP-6379-L
#6

Liquefied petroleum gas models (with cast iron burner) diagram

Thermocouple

Part #AP-6379-L

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.

View all

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…

Read more

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,…

Read more

Why does my hot water smell like rotten eggs?

Main causes: water supply needs chlorine treatment, anode rod too reactive…

Read more

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…

Read more

Why is my water heater's pressure relief valve dripping water?

Main causes: faulty pressure relief valve, water is overheating…

Read more

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…

Read more

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…

Read more

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.

View all
How to read a wiring schematic video

How to read a wiring schematic video

Learn how to decipher symbols so you can buy the right part for your problem.…

Read more
Easy DIY water heater repairs

Easy DIY water heater repairs

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

Read more
Water heater common questions

Water heater common questions

These common questions and answers can help you make the most of your water heater.…

Read more

Parts & More