Sears
Furnace

Model # 867766100 Official Sears horizontal gas furnace

Here are the diagrams and repair parts for Official Sears 867766100 horizontal gas furnace, 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.

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 52 parts  |

L Gas Valve 1003755
#7A

Functional replacement parts diagram

L gas valve

Part #1003755

Replaced by #36C03-333

?
Manufacturer substitution
This part replaces 1003755. Substitute parts can look different from the original.
$277.97
$12.00 OFF Phone Price : $289.97
In Stock
N Gas Valve 1003754
#7

Functional replacement parts diagram

N gas valve

Part #1003754

Replaced by #36C03-333

?
Manufacturer substitution
This part replaces 1003754. Substitute parts can look different from the original.
$277.97
$12.00 OFF Phone Price : $289.97
In Stock
Fan Relay 92840
#12

Functional replacement parts diagram

Fan relay

Part #92840

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

Blower Wheel 638195
#2

Functional replacement parts diagram

Blower wheel

Part #638195

In Stock
Capacitor 638105
#1

Functional replacement parts diagram

Capacitor

Part #638105

Replaced by #12910

?
Manufacturer substitution
This part replaces 638105. Substitute parts can look different from the original.
$8.37
11% OFF Phone Price : $9.37
In Stock
Thermocouple 100242
#8

Functional replacement parts diagram

Thermocouple

Part #100242

Replaced by #H06E-36

?
Manufacturer substitution
This part replaces 100242. Substitute parts can look different from the original.
This item is not returnable
$14.52
12% OFF Phone Price : $16.52
Back Order
Transformer 638010
#13

Functional replacement parts diagram

Transformer

Part #638010

Replaced by #90-4031F

?
Manufacturer substitution
This part replaces 638010. Substitute parts can look different from the original.
In Stock
Orifice Nat 503211

#NI

All parts diagram

Orifice nat

Part #503211

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

Switch 638099
#11

Functional replacement parts diagram

Switch

Part #638099

Replaced by #607900

?
Manufacturer substitution
This part replaces 638099. Substitute parts can look different from the original.
$26.43
19% OFF Phone Price : $32.43
In Stock
Burner 638014
#9A

Functional replacement parts diagram

Burner

Part #638014

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

Symptoms for upright freezers

Main causes: clogged or frozen defrost drain tube…

Repair guides for upright freezers

How to replace a freezer door switch

How to replace a freezer door switch

When the door switch fails, the freezer can’t detect that the door is closed. Follow the steps in this repair guide to r…

Repair difficulty
Time required
 15 minutes or less
How to replace a freezer thermistor

How to replace a freezer thermistor

When the thermistor can’t sense the freezer temperature, the freezer is colder or warmer than the set temperature. Follo…

Repair difficulty
Time required
 45 minutes or less
How to replace a freezer evaporator fan

How to replace a freezer evaporator fan

Air won’t circulate to cool the freezer properly when the evaporator fan fails. Follow these step-by-step instructions t…

Repair difficulty
Time required
 45 minutes or less

Effective articles & videos to help repair your furnaces

How to get your furnace ready for winter

How to get your furnace ready for winter

Get expert tips for preparing your furnace for winter. Follow maintenance tips to keep your furnace in top shape.…

Introducing new technical repair content that we’re developing for the Sears Technical Institute

Introducing new technical repair content that we’re developing for the Sears Technical Institute

Learn about Sears Technical Institute and the advanced technical content being developed for aspiring appliance techs.…

Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…