How do I reset my Westinghouse air conditioner?

To reset a Westinghouse air conditioner, turn off the main power supply or circuit breaker and wait for 5 to 10 minutes. Then turn the power back on and restart the AC system. This process may clear minor error codes.

What does E1 error mean in Westinghouse AC?

E1 error in Westinghouse air conditioners indicates a room temperature sensor fault. The thermistor may be damaged, disconnected, or malfunctioning and may require replacement.

Can I fix Westinghouse AC error codes myself?

Minor Westinghouse AC error codes can sometimes be resolved by resetting the air conditioner or cleaning air filters. However, major issues related to refrigerant, compressor, or control board should be repaired by a professional HVAC technician.

Westinghouse AC Error Codes List and Fixes

Q: What does P2 error mean in Westinghouse AC?

P2 error indicates low refrigerant pressure in the system. This usually happens due to refrigerant leakage, improper installation, or a damaged copper pipe.

Q: Why is my Westinghouse AC showing E5 error?

E5 error indicates a communication problem between the indoor and outdoor units. This can be caused by loose wiring, damaged communication cable, or PCB failure.

Q: How long does a Westinghouse air conditioner last?

A Westinghouse air conditioner typically lasts between 12 and 15 years with proper maintenance, regular servicing, and correct installation.

by HvacinExpert · Published March 4, 2026 · Updated March 4, 2026

Westinghouse AC Error Codes List and Fixes (Complete Troubleshooting Guide)

Is your Westinghouse air conditioner displaying an error code like E1, E5, F1, P4, or H3 and not cooling properly?

Modern Westinghouse air conditioning systems include intelligent self-diagnostic technology that monitors system performance and displays error codes whenever a malfunction occurs.

These codes help technicians and homeowners quickly identify problems and prevent serious damage to the air conditioner.

In this complete troubleshooting guide, you will learn:

Full Westinghouse AC error codes list
Meaning of each error code
Possible causes
Step-by-step troubleshooting solutions
DIY vs technician repair difficulty
Estimated repair costs
Preventive maintenance tips

Understanding these error codes helps you diagnose AC problems faster and reduce repair costs.

How Westinghouse AC Self-Diagnosis System Works

Modern Westinghouse inverter air conditioners use a microprocessor-based control board (PCB) that continuously monitors the entire HVAC system.

The system checks parameters such as:

Room temperature sensor
Evaporator coil temperature
Condenser temperature
Compressor current
Refrigerant pressure
Indoor-outdoor communication
Fan motor operation

If any abnormal condition occurs, the AC system will:

Display an error code on the indoor display panel
Stop compressor operation if necessary
Enter protection mode
Prevent further system damage

This protects important components including:

Compressor
Fan motors
Temperature sensors
Refrigerant circuit
Electronic control board

How to Check Westinghouse AC Error Codes

Before troubleshooting, identify the exact error code displayed by the AC unit.

Indoor Unit Display

Most Westinghouse split AC systems show error codes directly on the display panel.

Remote Controller Diagnosis

Some models allow diagnostic reading through the remote control display.

LED Indicator Blinking

Older models may show error codes through blinking LED lights.

Always note the exact code before restarting the AC.

Complete Westinghouse AC Error Codes List

Below is the complete list of common Westinghouse AC error codes.

Sensor Error Codes

E1 – Indoor Room Temperature Sensor Fault

Cause: Sensor failure or wiring problem
Fix: Replace temperature sensor

E2 – Evaporator Coil Sensor Error

Cause: Coil thermistor malfunction
Fix: Replace evaporator sensor

E3 – Outdoor Temperature Sensor Error

Cause: Outdoor thermistor failure
Fix: Replace outdoor sensor

E4 – Condenser Coil Sensor Error

Cause: Faulty condenser thermistor
Fix: Sensor replacement

E6 – Indoor Coil Freeze Protection

Cause: Low airflow or refrigerant issue
Fix: Clean filters and check refrigerant

E7 – Indoor Temperature Sensor Open Circuit

Cause: Broken thermistor wiring
Fix: Replace sensor

E8 – Indoor Sensor Short Circuit

Cause: Sensor short circuit
Fix: Replace thermistor

Communication Error Codes

E5 – Indoor-Outdoor Communication Failure

Cause: Wiring issue between units
Fix: Check communication cable

E9 – Communication PCB Fault

Cause: PCB malfunction
Fix: PCB inspection required

E10 – Indoor Control Board Communication Error

Cause: Control board fault
Fix: Replace PCB

Fan Motor Error Codes

F1 – Indoor Fan Motor Fault

Cause: Motor failure or capacitor problem
Fix: Inspect motor and capacitor

F2 – Indoor Fan Speed Error

Cause: Fan motor speed abnormal
Fix: Replace motor

F3 – Outdoor Fan Motor Fault

Cause: Outdoor fan failure
Fix: Replace condenser fan motor

F4 – Outdoor Fan Motor Lock

Cause: Motor jammed or capacitor damaged
Fix: Repair or replace motor

F5 – Fan Motor Overcurrent

Cause: Electrical overload
Fix: Check motor and wiring

Refrigerant System Error Codes

P0 – Refrigerant System Protection

Cause: Low refrigerant or blockage
Fix: Check refrigerant pressure

P1 – High Pressure Protection

Cause: Dirty condenser coil
Fix: Clean outdoor unit

P2 – Low Pressure Protection

Cause: Refrigerant leakage
Fix: Leak detection and gas refill

P3 – Compressor Temperature Protection

Cause: Compressor overheating
Fix: Check condenser airflow

P4 – Inverter Compressor Drive Error

Cause: Inverter PCB malfunction
Fix: PCB inspection required

P5 – Refrigerant Overcharge Protection

Cause: Excess refrigerant
Fix: Adjust refrigerant level

Compressor Error Codes

H1 – Compressor Overload Protection

Cause: Compressor overheating
Fix: Check refrigerant pressure

H2 – Compressor Start Failure

Cause: Capacitor damage
Fix: Replace capacitor

H3 – Compressor Overcurrent

Cause: Electrical overload
Fix: Check power supply

H4 – Compressor Phase Protection

Cause: Phase imbalance
Fix: Electrical inspection

H5 – Compressor Drive Error

Cause: Inverter PCB fault
Fix: Replace inverter board

Voltage and Power Error Codes

U1 – Power Supply Voltage Too High

Cause: Voltage fluctuation
Fix: Install voltage stabilizer

U2 – Power Supply Voltage Too Low

Cause: Low power supply
Fix: Check electrical supply

U3 – Phase Loss Protection

Cause: Missing phase in power supply
Fix: Electrical repair required

U4 – Phase Sequence Error

Cause: Incorrect wiring sequence
Fix: Correct phase connection

Additional Protection Error Codes

L1 – Indoor Unit Protection

L2 – Outdoor Unit Protection

L3 – High Temperature Protection

L4 – Low Temperature Protection

L5 – System Overload Protection

Quick Reference Table – Westinghouse Error Codes

Code	Meaning	Cause	Difficulty
E1	Room sensor fault	Thermistor failure	Medium
E5	Communication error	Wiring issue	High
F1	Indoor fan motor fault	Motor failure	Medium
P2	Low pressure protection	Refrigerant leak	High
H3	Compressor overcurrent	Electrical overload	High
U1	High voltage	Voltage fluctuation	Medium

Minor vs Major Westinghouse AC Errors

Minor Errors (DIY Fix Possible)

These issues often resolve after filter cleaning or system reset.

Major Errors (Technician Required)

These involve compressor or refrigerant system repair.

Estimated Westinghouse AC Repair Cost

Problem	Estimated Cost
Sensor Replacement	₹1000 – ₹3000
Gas Refill	₹2000 – ₹6000
Fan Motor Repair	₹3000 – ₹8000
PCB Replacement	₹5000 – ₹12000
Compressor Replacement	₹10000+

Actual repair cost depends on AC model and city location.

Common Reasons for Westinghouse AC Error Codes

Most AC faults occur due to:

Dirty air filters
Refrigerant leakage
Voltage fluctuation
Condenser blockage
Poor installation
Lack of maintenance

Regular servicing prevents most system problems.

Preventive Maintenance Tips

To reduce AC errors:

Clean air filters every month
Service AC before summer season
Keep condenser coil clean
Maintain airflow around outdoor unit
Install voltage stabilizer
Schedule yearly HVAC inspection

Preventive maintenance can reduce breakdowns by up to 70%.

When Should You Call a Technician?

Contact HVAC service immediately if:

Compressor related error appears
AC repeatedly trips breaker
Burning smell detected
Loud abnormal noise occurs
Refrigerant leak suspected

Never attempt compressor or PCB repair without professional tools.

Frequently Asked Questions (FAQ)

How do I reset my Westinghouse AC?

Turn off the power supply for 5–10 minutes, then restart the system.

What does P2 error mean in Westinghouse AC?

P2 indicates low refrigerant pressure, usually caused by gas leakage.

Why is my Westinghouse AC showing E5 error?

E5 means communication failure between indoor and outdoor units.

Can I fix AC error codes myself?

Minor errors may be fixed by cleaning filters or resetting the system, but major errors require HVAC technician inspection.

How long does a Westinghouse air conditioner last?

With proper maintenance, a Westinghouse AC can last 12–15 years.

Final Summary

Westinghouse AC error codes help diagnose problems related to:

Sensors
Refrigerant system
Fan motors
Compressor protection
Electrical supply

Understanding these codes allows you to:

Diagnose problems faster
Reduce repair costs
Prevent system damage
Extend AC lifespan

Minor issues : Reset AC and clean filters
Major issues : Call HVAC technician

Conclusion

Westinghouse AC error codes are designed to protect your air conditioner from serious damage.

Whether it is E1 sensor fault, P2 refrigerant leak, or H3 compressor overload, early troubleshooting can save both time and money.

Regular maintenance, proper installation, and professional servicing will ensure your Westinghouse air conditioner runs efficiently for many years.