Westinghouse Air Conditioner Error F3

⚡ Quick Answer: The Westinghouse Air Conditioner F3 error indicates a malfunction with the compressor discharge temperature sensor, leading to incorrect temperature r... ✅ DIY Fixable

What Does Error F3 Mean?

The Westinghouse Air Conditioner F3 error indicates a malfunction with the compressor discharge temperature sensor, leading to incorrect temperature readings and potential cooling issues. This fault may stem from an open or short circuit in the sensor, preventing the unit from functioning properly.

Common Symptoms:

  • Unit may stop cooling
  • Error code F3 displayed on indoor unit

Possible Causes

  • Compressor discharge temperature sensor open circuit or short circuit (medium)

How to Fix Error F3

DIY Fix Check basic connections and power cycle

  1. Turn off and disconnect the air conditioner from power.
  2. Wait 5 minutes and then restore power to see if the error clears.
  3. Ensure that the outdoor unit is free of debris and that air intake and outlet are not blocked.

Technician Only Inspect and replace the compressor discharge temperature sensor

  1. Disconnect power at the breaker.
  2. Access the outdoor unit control box and locate the compressor discharge (T5) temperature sensor.
  3. Test sensor resistance and wiring continuity with a multimeter to confirm open circuit or short.
  4. Replace the faulty temperature sensor and verify proper connection to PCB.
  5. Restore power and test unit operation to confirm resolution.

Parts needed: Compressor discharge (T5) temperature sensor, Potential wiring harness or connectors

🛑 When to Call a Pro:
  • If you’re unable to locate or access sensor wiring safely.
  • If replacing the temperature sensor does not clear the code.
  • If there are signs of refrigerant issues or compressor overheating.

Next step

Choose the next step for F3

Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.

Based on diagnostic data

Most relevant component to inspect

Temperature Sensor

Monitors the internal temperature to ensure correct operation and prevent overheating.

Typical part-only price
$15 - $35
DIY difficulty
Easy
Estimated time
15-30 mins
Where can I find the model number?

Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.

Find a part that fits my model

Verify the complete model and part number on the retailer's compatibility page before ordering.

Other parts options

Check related components first; use model search as a fallback.

Possible related component

Wiring Harness

Connects controls, sensors, motors, and other electrical components inside the appliance.

$20 - $120 · Medium · 30-90 mins

Check fit & price
Model number required

Model-compatible Air Conditioner parts

Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.

Find a part that fits my model

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Optional routine care

Maintenance supplies

These products support cleaning or routine upkeep. They are separate from the possible repair components above and are not claimed to fix this error code or symptom.

Maintenance supply

Air Conditioner Fin Cleaner

For routine cleaning of accessible coil fins when permitted by the manufacturer. Disconnect power and follow product and appliance instructions.

View maintenance supply
Maintenance supply

Model-Compatible Washable AC Filter

A reusable filter option only where the appliance supports one. Match the full model, dimensions, and filter specification.

Compatibility check required: use the complete appliance model and compare the existing filter, bag, or specification before ordering.

Find one that fits my model

Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Recommendations are based on routine-care relevance, not commission rate.

Technical Specifications

wattage N/A
component Temperature Sensor
resistance 5-10 kOhms
part_number WAC-TS-001
voltage_rating 120V AC

Common Questions

What does F3 error mean on Westinghouse Air Conditioner?

F3 error indicates a malfunction in the compressor discharge temperature sensor, causing cooling issues.

Can I fix Westinghouse Air Conditioner F3 error myself?

Yes, you can check connections and power cycle the unit to see if the error clears.

How much does it cost to fix F3 error?

Estimated repair cost ranges from $50 to $200, including parts and labor.

When should I call a technician for F3?

Call a technician if you can't safely access the wiring or if the error persists after your attempts to fix it.

Sources & References

Data last verified: 2026-07-22

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