How do I reset my TCL air conditioner?

To reset a TCL air conditioner, switch off the main power supply or circuit breaker and wait for about 5 to 10 minutes. After that, turn the power back on and restart the AC. This reset can clear minor error codes.

What does E1 error mean in TCL AC?

E1 error in a TCL air conditioner usually indicates a room temperature sensor fault. The thermistor may be damaged, disconnected, or malfunctioning and may need replacement.

TCL AC Error Codes List With Fixes

Q: What does P2 error mean in TCL AC?

P2 error indicates low refrigerant pressure in the air conditioning system. This often occurs due to refrigerant leakage, improper installation, or a damaged copper pipe.

Q: Why is my TCL AC showing E5 error?

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

Q: Can I fix TCL AC error codes myself?

Some minor TCL AC error codes can be fixed by cleaning air filters, ensuring proper airflow, or resetting the system. However, major problems related to refrigerant, compressor, or control boards require a professional HVAC technician.

Q: How long does a TCL air conditioner last?

A TCL air conditioner usually lasts between 10 and 15 years when properly maintained with regular servicing and correct installation.

by HvacinExpert · Published March 5, 2026 · Updated March 5, 2026

TCL AC Error Codes List With Fixes (Complete Troubleshooting Guide)

Is your TCL air conditioner displaying an error code like E1, E6, F0, or P4 and not cooling properly?

Modern TCL air conditioning systems feature intelligent self-diagnosis technology that monitors system performance and automatically displays error codes whenever a malfunction occurs.

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

In this complete TCL AC troubleshooting guide, you will learn:

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

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

How TCL AC Self-Diagnosis System Works

Modern TCL inverter air conditioners use a microprocessor-based control board that constantly monitors the system.

The system checks several parameters including:

Room temperature sensor
Evaporator coil temperature
Outdoor condenser temperature
Compressor current
Refrigerant pressure
Indoor-outdoor communication signals
Fan motor operation
Power supply voltage

If an abnormal condition occurs, the AC will:

Display an error code on the indoor unit display panel
Stop compressor operation if necessary
Activate system protection mode
Prevent damage to internal components

This protection system safeguards important parts such as:

Compressor
Fan motors
Sensors
Refrigerant system
Electronic control board (PCB)

How to Check TCL AC Error Codes

Before troubleshooting your AC, identify the exact error code displayed on the system.

Indoor Unit Display

Most TCL split AC models show error codes directly on the indoor unit LED display.

Remote Controller Diagnosis

Some TCL models support remote control diagnostic mode.

LED Indicator Flash Codes

Older models may indicate faults through blinking LED lights.

Always write down the exact code before restarting the AC.

Complete TCL AC Error Codes List (60+ Codes)

Below are the most commonly reported TCL air conditioner error codes and troubleshooting solutions.

Sensor Error Codes

E1 – Indoor Room Temperature Sensor Fault

Cause: Thermistor malfunction
Fix: Replace indoor temperature sensor

E2 – Indoor Coil Sensor Error

Cause: Evaporator thermistor damage
Fix: Replace coil sensor

E3 – Outdoor Temperature Sensor Fault

Cause: Outdoor thermistor failure
Fix: Replace sensor

E4 – Condenser Coil Sensor Fault

Cause: Condenser temperature sensor malfunction
Fix: Replace sensor

E5 – Indoor-Outdoor Communication Error

Cause: Communication cable problem
Fix: Inspect wiring between units

E6 – Indoor Coil Freeze Protection

Cause: Restricted airflow or low refrigerant
Fix: Clean filters and check refrigerant

E7 – Indoor Sensor Open Circuit

Cause: Broken thermistor wiring
Fix: Replace thermistor

E8 – Indoor Sensor Short Circuit

Cause: Thermistor short circuit
Fix: Replace sensor

Fan Motor Error Codes

F0 – Indoor Fan Motor Fault

Cause: Motor failure or capacitor issue
Fix: Replace fan motor

F1 – Indoor Fan Speed Error

Cause: Fan motor speed abnormal
Fix: Inspect motor assembly

F2 – Outdoor Fan Motor Fault

Cause: Condenser fan motor damage
Fix: Replace outdoor fan motor

F3 – Outdoor Fan Lock Protection

Cause: Fan motor jammed
Fix: Clean or replace fan motor

F4 – Fan Motor Overcurrent Protection

Cause: Electrical overload
Fix: Inspect wiring

Refrigerant System Error Codes

P0 – Refrigerant System Protection

Cause: Low refrigerant pressure
Fix: Check refrigerant charge

P1 – High Pressure Protection

Cause: Dirty condenser coil
Fix: Clean condenser

P2 – Low Pressure Protection

Cause: Refrigerant leakage
Fix: Leak detection and gas refill

P3 – Compressor Temperature Protection

Cause: Compressor overheating
Fix: Check airflow and refrigerant

P4 – Inverter Compressor Drive Error

Cause: Inverter PCB malfunction
Fix: Replace inverter board

P5 – Refrigerant Overcharge Protection

Cause: Excess refrigerant
Fix: Adjust refrigerant level

Compressor Error Codes

H1 – Compressor Overload Protection

Cause: Compressor overheating
Fix: Inspect refrigerant pressure

H2 – Compressor Start Failure

Cause: Capacitor failure
Fix: Replace capacitor

H3 – Compressor Overcurrent Protection

Cause: Electrical overload
Fix: Inspect wiring

H4 – Compressor Phase Error

Cause: Phase imbalance
Fix: Electrical inspection

H5 – Compressor Drive Module Error

Cause: Inverter PCB failure
Fix: Replace PCB

Power Supply Error Codes

U1 – Power Supply Voltage High

Cause: Voltage fluctuation
Fix: Install voltage stabilizer

U2 – Power Supply Voltage Low

Cause: Low electrical supply
Fix: Check power supply

U3 – Phase Loss Protection

Cause: Missing electrical phase
Fix: Electrical repair required

U4 – Phase Sequence Error

Cause: Incorrect wiring sequence
Fix: Correct phase wiring

Additional Protection Error Codes

L1 – Indoor Unit Protection

L2 – Outdoor Unit Protection

L3 – High Temperature Protection

L4 – Low Temperature Protection

L5 – System Overload Protection

L6 – Compressor Lock Protection

L7 – Inverter Module Overheat

L8 – Drive Module Fault

Quick Reference Table – TCL AC Error Codes

Code	Meaning	Cause	Difficulty
E1	Room sensor fault	Thermistor failure	Medium
E5	Communication error	Wiring issue	High
F0	Indoor fan motor fault	Motor failure	Medium
P2	Low pressure protection	Refrigerant leak	High
H3	Compressor overcurrent	Electrical overload	High
U1	High voltage protection	Voltage fluctuation	Medium

Minor vs Major TCL AC Error Codes

Minor Errors (DIY Fix Possible)

These issues may resolve after cleaning filters or resetting the system.

Major Errors (Technician Required)

These involve compressor or refrigerant system repair.

Estimated TCL AC Repair Cost

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

Costs vary depending on AC model and location.

Common Reasons for TCL AC Error Codes

Most TCL AC faults occur due to:

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

Regular servicing prevents most AC failures.

Preventive Maintenance Tips

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?

Call 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 yourself.

Frequently Asked Questions (FAQ)

How do I reset my TCL AC?

Turn off the main power supply for 5–10 minutes, then restart the air conditioner.

What does P2 error mean in TCL AC?

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

Why is my TCL AC showing E5 error?

E5 indicates communication failure between indoor and outdoor units.

Can I fix TCL AC error codes myself?

Minor errors may be fixed by cleaning filters or resetting the AC, but major errors require technician service.

How long does a TCL air conditioner last?

A TCL AC typically lasts 10–15 years with proper maintenance.

Final Summary

TCL AC error codes help diagnose problems related to:

Sensors
Refrigerant system
Fan motors
Compressor protection
Electrical supply

Understanding these codes allows you to:

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

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

Conclusion

TCL 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 TCL air conditioner operates efficiently for many years.