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Friedrich
Heating & Cooling Combined Unit

Model # TEC12K25 Official Friedrich central packaged terminal unit

Here are the diagrams and repair parts for Official Friedrich TEC12K25 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  |
Isolator 21063375
#42

Air handler diagram

Isolator

Part #21063375

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

Rework Kit 25009900

#NI13

All parts diagram

Rework kit

Part #25009900

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

Thermostat Knob 21058437
#66

Control box assembly diagram

Thermostat knob

Part #21058437

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

Clip,t Sta 21058518
#66A

Control box assembly diagram

Clip,t sta

Part #21058518

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

Terminal Board 21058986

#NI03

All parts diagram

Terminal board

Part #21058986

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

Filter Mol 21058402
Filter mol

Part #21058402

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

Collar Assembly 25009700
#44A

Air handler diagram

Collar assembly

Part #25009700

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

Blower Scroll 21058350
#34

Air handler diagram

Blower scroll

Part #21058350

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

Choose a symptom to see related heating and air conditioning system repairs.

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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

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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Repair difficulty
Time required
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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15 minutes or less
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

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

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How to enjoy all the online benefits we offer on our Sears PartsDirect website

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