Westinghouse Air Conditioner Error E1

⚡ Quick Answer: The Westinghouse Air Conditioner E1 error signifies a malfunction with the indoor temperature sensor (thermistor) or a communication issue between the... ✅ DIY Fixable

What Does Error E1 Mean?

The Westinghouse Air Conditioner E1 error signifies a malfunction with the indoor temperature sensor (thermistor) or a communication issue between the indoor and outdoor units. This error typically results in the unit failing to operate normally, with the display showing E1 shortly after power-up or during cooling attempts. It is crucial to address this promptly to restore proper function.

Common Symptoms:

  • Unit will not run and displays E1 shortly after power‑up or when starting cooling.
  • Indoor unit fails to start normal operation due to sensor/communication fault.

Possible Causes

  • Faulty indoor temperature sensor (thermistor) (medium)
  • Loose, damaged, or poor wiring/connection affecting sensor communication (medium)

How to Fix Error E1

DIY Fix Basic visual check and power cycle

  1. Turn off the air conditioner using the remote.
  2. Switch off power at the breaker for 5–10 minutes to reset the control.
  3. Restore power and check if E1 persists.

Technician Only Inspect sensor and wiring, replace if needed

  1. Open the indoor unit and locate the room temperature sensor/thermistor.
  2. Check sensor wiring for loose connections, corrosion, or breaks.
  3. Test sensor resistance with a multimeter and compare to expected values.
  4. Replace the thermistor and/or repair wiring if out of specification.

Parts needed: Room temperature thermistor (indoor sensor), Sensor wiring harness/connectors

🛑 When to Call a Pro:
  • If the error remains after power cycling and visual wiring inspection.
  • If there are signs of electrical damage, burning smell, or intermittent operation.

Next step

Choose the next step for E1

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

Thermistor

Measures precise temperature changes and sends resistance feedback to the control board.

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 WS-TS-001
voltage_rating 120V AC

Common Questions

What does E1 error mean on Westinghouse Air Conditioner?

E1 indicates a fault with the indoor temperature sensor or communication issues, leading to failure in normal operation.

Can I fix Westinghouse Air Conditioner E1 error myself?

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

How much does it cost to fix E1 error?

Repair costs typically range from $80 to $250 for parts and labor, depending on your region.

When should I call a technician for E1?

Call a technician if the error persists after power cycling or if you notice electrical damage or unusual smells.

Data last verified: 2026-07-22

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