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
Thermal Zone
Furnace

Model # GU040M12A Official Thermal Zone gas furnace

Here are the diagrams and repair parts for Official Thermal Zone GU040M12A 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 27 parts  |
Central Air Conditioner Air Handler Drain Pan Connector 663714
#23

90+ upflow condensing furnace diagram

Central air conditioner air handler drain pan connector

Part #663714

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

Orifice 661045
#16

90+ upflow condensing furnace diagram

Orifice

Part #661045

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

Blower Wheel 667251
#6

90+ upflow condensing furnace diagram

Blower wheel

Part #667251

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

Furnace Vent Limit Switch, 160-degree 626461
#27

90+ upflow condensing furnace diagram

Furnace vent limit switch, 160-degree

Part #626461

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

Furnace Electronic Control Board 903106
#11

90+ upflow condensing furnace diagram

Furnace electronic control board

Part #903106

$297.66
In Stock
Pressure Swt 632252
#18

90+ upflow condensing furnace diagram

Pressure swt

Part #632252

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

Gas Valve 624586
#13

90+ upflow condensing furnace diagram

Gas valve

Part #624586

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

Sensor Rod 632316
#15

90+ upflow condensing furnace diagram

Sensor rod

Part #632316

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

Furnace Temperature Limit Switch 626425
#19

90+ upflow condensing furnace diagram

Furnace temperature limit switch

Part #626425

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

Transformer 621486
#3

90+ upflow condensing furnace diagram

Transformer

Part #621486

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

Repair guides for front-engine lawn tractors

How to replace a ground drive belt on a riding lawn mower

How to replace a ground drive belt on a riding lawn mower

Replace the ground drive belt if it's broken or too worn to spin the transaxle pulley.…

Read more
Repair difficulty
Time required
 45 minutes or less
How to replace a blade clutch cable on a riding lawn mower

How to replace a blade clutch cable on a riding lawn mower

If the blades don't spin on your riding mower when you shift the lever, the blade clutch cable could be broken. Here’s h…

Read more
Repair difficulty
Time required
 30 minutes or less
How to replace a riding lawn mower blade drive belt

How to replace a riding lawn mower blade drive belt

Replace the blade drive belt if it's broken or won't spin the cutting blades because of wear.…

Read more
Repair difficulty
Time required
 45 minutes or less

Effective articles & videos to help repair your furnaces

View all
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.…

Read more
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.…

Read more
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.…

Read more

Parts & More