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Monarch
Heating & Cooling

Model # TFC-1 Official Monarch furnace thermostat

Here are the diagrams and repair parts for Official Monarch TFC-1 furnace thermostat, 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:

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  • 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

Model diagram and schematic

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Showing 10 of 21 parts  |
Twist-on Wire Connector 0115017
#18

Control box diagram

Twist-on wire connector

Part #0115017

Replaced by #STD375005

?
Manufacturer substitution
This part replaces 0115017. Substitute parts can look different from the original.
This item is not returnable
$2.49 | 
29% OFF Phone Price : $3.49
In Stock
Screw 0144051
#2

Control box diagram

Screw

Part #0144051

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

Nipple Chase 0156818
#6

Control box diagram

Nipple chase

Part #0156818

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

Lock Nut 0156780
#5

Control box diagram

Lock nut

Part #0156780

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

Screw 0144238
#20

Control box diagram

Screw

Part #0144238

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

Fastener 2052030
#9

Control box diagram

Fastener

Part #2052030

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

Motor 0156815
#3

Control box diagram

Motor

Part #0156815

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

Plate 0156819
#1

Control box diagram

Plate

Part #0156819

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

Mounting Box 2026156W
#15

Control box diagram

Mounting box

Part #2026156W

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

Rivet 0142018
#7

Control box diagram

Rivet

Part #0142018

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

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