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Friedrich
Heating & Cooling Combined Unit

Model # THC12K50 Official Friedrich central packaged terminal unit

Here are the diagrams and repair parts for Official Friedrich THC12K50 central packaged terminal unit, as well as links to manuals and error code tables, if available.

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Owner’s manual

Model diagram and schematic

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ALL PARTS
Showing 10 of 106 parts  |
Tray 21058876
#19

Unit assembly diagram

Tray

Part #21058876

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

Coil Evaporator 25018600
#10

Unit assembly diagram

Coil evaporator

Part #25018600

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

Extension Spring 21058530
Extension spring

Part #21058530

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

Relay 21058148
Relay

Part #21058148

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

Line Cord 21058584
#71B

Control box assembly diagram

Line cord

Part #21058584

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

Insulation 21058387
#48

Air handler diagram

Insulation

Part #21058387

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

Coil,solen 21058644
#10G

Unit assembly diagram

Coil,solen

Part #21058644

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

Push Button 21058728
#68

Control box assembly diagram

Push button

Part #21058728

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

Filter 25025600
Filter

Part #25025600

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

Overload 21090034
#13A

Unit assembly diagram

Overload

Part #21090034

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

Most common symptoms to help you fix your heating & cooling combined units

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Why is my furnace not blowing hot enough?

Thermostat problem, clogged air filter, burner failure…

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Why isn’t my air conditioner cooling well?

Dirty air filter, clogged condenser coils, low refrigerant charge, faulty compressor…

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Why isn’t my air conditioner cooling?

Thermostat problems, bad compressor/condenser fan capacitor, lack of refrigerant, failed compressor…

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Why won’t my furnace burners won’t stay lit?

Dirty flame sensor, failed flame sensor, damaged burner, bad high limit switch…

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Why won't my air conditioner turn on?

Main causes: errant thermostat settings, lack of electrical power, clogged drain line, wiring failure, control failure.…

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Why won't my furnace turn on?

Main causes: Errant thermostat settings, lack of power, bad interlock switches, lack of exhaust ventilation, wiring fail…

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Most common repair guides to help fix your heating & cooling combined units

These step-by-step repair guides will help you safely fix what’s broken on your HVAC system.

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How to unclog the air conditioner drain line

How to unclog the air conditioner drain line

The condensate drain line for your central air conditioner can clog with mold and mildew. Water will back up and start d…

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 15 minutes or less
How to replace the furnace flame sensor

How to replace the furnace flame sensor

The flame sensor detects when furnace burner flames are lit. You may need to replace the flame sensor if flames only sta…

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How to replace a heating and air conditioning system thermostat

How to replace a heating and air conditioning system thermostat

The control thermostat for your HVAC system can stop working. This repair guide shows how to replace it.…

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Time required
 30 minutes or less

Effective articles & videos to help repair your heating & cooling combined units

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

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Maintaining your air conditioner

Maintaining your air conditioner

Learn how to maintain your central air conditioner to keep it running smoothly all summer long.…

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How to prevent the 2 most common AC failures from ruining your summer

How to prevent the 2 most common AC failures from ruining your summer

Get tips to help keep your central AC running all summer long…

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What to check if your air conditioner isn't cooling video

What to check if your air conditioner isn't cooling video

If your central air conditioner isn't cooling as it should, we'll show you how to check for a tripped float switch and c…

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