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Friedrich
Heating & Cooling Combined Unit

Model # THC12R34 Official Friedrich central packaged terminal unit

Here are the diagrams and repair parts for Official Friedrich THC12R34 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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Showing 10 of 106 parts  |
Motor,265v 21061129
#45A

Air handler diagram

Motor,265v

Part #21061129

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

Thermostat 21058517
#65A

Control box assembly diagram

Thermostat

Part #21058517

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

Limit Switch 21058409
#50B

Air handler diagram

Limit switch

Part #21058409

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

Short Shaft 25009600
#40

Air handler diagram

Short shaft

Part #25009600

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

Check Valve 21058568
#10C

Unit assembly diagram

Check valve

Part #21058568

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

Tray 21058876
#19

Unit assembly diagram

Tray

Part #21058876

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

Push Switch 21058708
#67A

Control box assembly diagram

Push switch

Part #21058708

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

Limit Switch 21058407
#50

Air handler diagram

Limit switch

Part #21058407

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

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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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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

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