Is your Kelvinator air conditioner suddenly failing to cool and flashing a cryptic code like E6, F1, or H6 on the display panel? In the middle of a hot day, a broken AC feels like an emergency, but those flashing letters and numbers are actually your system’s built-in self-diagnosis tool pointing you exactly to the failure.
Whether you are dealing with a faulty room temperature sensor (F1), a stalled indoor fan motor (H6), or a communication breakdown between units (E6), decoding these Kelvinator faults quickly can save you from unnecessary and expensive service calls. We have compiled the complete troubleshooting database for Kelvinator split systems and inverters.
Instead of scrolling through a dense user manual, use our Interactive Kelvinator Error Code Decoder below. Simply select your code to instantly reveal the hidden cause and the step-by-step DIY solution to get your airflow back to normal.
Select your flashing error code below for instant diagnostics.
⚠️ Pro Safety Tip: While issues like dirty filters triggering anti-freeze protection (E2) or voltage fluctuations (PH/PL) are easy to diagnose, errors involving the IPM power module (H5), EEPROM chip failure (EE), or refrigerant leaks (E3) should always be handled by our licensed HVAC technicians.
Kelvinator air conditioner error code C5
Problem:
There is a jumper cap malfunction. The standby LED flashes 15 times to signal this error.
Solution:
You need to inspect the jumper cap for correct termination to the indoor PCB.
If the jumper cap is terminated correctly but the C5 error still keeps appearing, you will have to replace the indoor PCB.
Kelvinator air conditioner error code D1
Problem:
This error code means DRED (Compressor OFF).
Kelvinator air conditioner error code D2
Problem:
This error code means DRED (Output Capacity -50%).
In this case, the air conditioner continues to perform heating or cooling. However, the electricity consumed by the AC in a half-hour period is not more than 50% of the electricity that would be consumed by the air conditioner if it was operating at the rated capacity in a half-hour period.
Kelvinator air conditioner error code D3
Problem:
This error code means DRED (Output Capacity -75%).
In this case, the air conditioner continues to perform heating or cooling. However, the electricity consumed by the AC in a half-hour period is not more than 75% of the electricity that would be consumed by the air conditioner if it was operating at the rated capacity in a half-hour period.
Kelvinator air conditioner error code E2
Problem:
It occurs due to anti-freeze protection. The standby LED flashes 2 times.
Solution:
Check the refrigerant charge.
Check if the filters of the indoor unit are blocked.
Check if there are any blockages in the refrigeration system.
Check if the evaporator fan is operating correctly.
Kelvinator air conditioner error code E3
Problem:
This error occurs when there is a gas leak or the refrigeration system is blocked.
The standby LED flashes 3 times.
Solution:
Check if there are any restrictions in the refrigeration system or capillary tube.
Check the low-pressure sensor connector plug that is located on the outdoor PCB and also the 2 spade terminals present on the low-pressure sensor for continuity and correct termination.
Check the low-pressure sensor which is present right next to the compressor. This sensor is normally closed.
Next, check the refrigerant charge by removing the 2 spade terminals connected to the low-pressure sensor and then installing them together to complete the circuit.
Kelvinator air conditioner error code E4
Problem:
It is caused by compressor high-temperature protection. The standby LED flashes 4 times.
Solution:
Check for airflow obstructions in the outdoor coil.
Check for correct operations in the outdoor fan motor.
Kelvinator air conditioner error code E5
Problem:
It is caused by AC overcurrent protection. The standby LED flashes 5 times.
Solution:
Check the maximum current draw while the air conditioner unit is running. If the current draw exceeds the maximum current rating given on the outdoor rating plate, then you need to check the working of the compressor.
Kelvinator air conditioner error code E6
Problem:
It is caused due to a communication fault. The standby LED flashes 6 times.
Solution:
Turn off the power.
Remove the signal wire from the indoor terminal block.
Now power ON the unit and let it run in standby mode.
Find the signal wire that connects to the ground and the indoor unit. Use a multimeter to test the DC output from the signal wire.
If you detect a low stable voltage, it means the indoor PCB is working completely fine.
Now use a multi-meter again to test the output signal on the terminal block of the PCB of the outdoor unit and grounding.
If you detect a voltage close to the low 50s, it means that the PCB is working fine.
But if the result is 0 DC volts, it means the PCB is malfunctioning.
Use the isolation switch for disconnecting the power supply to the indoor unit. After 1 minute, turn it ON again and run the AUTO mode. The temperature should be set at 2 degrees more or less than your current room air temperature.
Kelvinator air conditioner error code E8
Problem:
This error occurs due to anti-high temperature protection. The standby LED flashes 8 times.
Solution:
Check for airflow obstructions in the indoor coil.
Check for correct operations in the indoor fan motor.
Kelvinator air conditioner error code EE
Problem:
Loading EEPROM malfunction leads to error code EE. The heating LED flash 15 times.
Solution:
Make sure that the PROGRAM CHIP is correctly anchored to the outdoor PDB. If it is correctly anchored but the error code EE appears again, you need to replace the outdoor PCB assembly.
Kelvinator air conditioner error code F1
Problem:
This error code means there is an indoor room temperature sensor failure.
The cooling LED flashes 1 time.
Solution:
Check the indoor tube sensors and indoor ambient sensors and make sure their connection is correct.
Check the relevant sensor for continuity. If you detect that the sensor is open-circuit then you have to change it.
But if the sensors and their wiring and connection are fine, but the error code F1 still appears then change the indoor PCB.
Kelvinator air conditioner error code F2
Problem:
This error code means there is a problem with the tube temperature sensor (indoor).
The cooling LED flashes 2 times.
Solution:
Check the indoor tube sensors and indoor ambient sensors and make sure their connection is correct.
Check the relevant sensor for continuity. If you detect that the sensor is open-circuit then you have to change it.
But if the sensors and their wiring and connection are fine, but the error code F2 still appears then change the indoor PCB.
Kelvinator air conditioner error code F3
Problem:
This error code means there is a problem with the outdoor ambient sensor.
The cooling LED flashes 3 times.
Solution:
Check if the connection of the outdoor ambient sensor, condenser coil, and compressor discharge triple point sensor plug is alright.
Inspect the continuity of each sensor and if any sensor is open-circuit then you need to replace the entire triple connector plug assembly.
If all the sensors and wiring connections are fine, but the error code appears again, replace the main outdoor PCB.
Kelvinator air conditioner error code F4
Problem:
This error code means there is a problem with the outdoor coil sensor.
The cooling LED flashes 4 times.
Solution:
Check if the connection of the outdoor ambient sensor, condenser coil, and compressor discharge triple point sensor plug is alright.
Inspect the continuity of each sensor and if any sensor is open-circuit then you need to replace the entire triple connector plug assembly.
If all the sensors and wiring connections are fine, but the error code F4 appears again, replace the main outdoor PCB.
Kelvinator air conditioner error code F5
Problem:
This error code means there is a problem with the outdoor compressor discharge sensor.
The cooling LED flashes 5 times.
Solution:
Check if the connection of the outdoor ambient sensor, condenser coil, and compressor discharge triple point sensor plug is alright.
Inspect the continuity of each sensor and if any sensor is open-circuit then you need to replace the entire triple connector plug assembly.
If all the sensors and wiring connections are fine, but the error code F5 appears again, replace the main outdoor PCB.
Kelvinator air conditioner error code F6
Problem:
This error occurs due to the anti-high temperature protection of the air conditioner.
The cooling LED flashes 6 times while the yellow LED on the outdoor unit flashes 4 times.
Solution:
Check if there are any airflow obstructions in the outdoor coil.
Check if the outdoor fan motor is working properly.
Kelvinator air conditioner error code FH
Problem:
This error occurs either due to a drop in frequency or an anti-freeze limit.
The heating LED and cooling LED flash 2 times.
Solution:
Check the refrigerant charge.
Check if the filters of the indoor unit are blocked.
Check if the evaporator fan is operating properly.
Check if there are any blockages in the refrigeration system.
Kelvinator air conditioner error code H1
Problem:
This error code appears due to defrosting. The indoor heating LED flashes 1 time whereas the outdoor yellow LED flashes 2 times.
Kelvinator air conditioner error code H3
Problem:
This error code appears due to compressor overload protection. The heating LED flashes 3 times.
Solution:
Check the refrigerant charge.
Check if there are any restrictions in the capillary tube.
Check if the airflow across the outdoor coils and the indoor coils is poor.
Check if the 4-way reversing valve is operating normally.
Kelvinator air conditioner error code H5
Problem:
This error code appears due to IPM protection. The heating LED flashes 5 times.
Solution:
- Use the isolation switch to disconnect the power supply of the unit.
- First, you need to remove the Red-W, Yellow-V & Blue-U spade terminals from the main outdoor PCB to the compressor.
- After that, you need to measure the resistance value of each winding from these 3 spade terminal points.
- The value of resistance should be the same across any terminal combination. The values of resistance will change according to the ambient temperatures and capacity.
- If you find any infinite resistance readings or open-circuit, then measure the values of resistance from the spade terminals on the compressor.
If all the resistance checks are normal, follow the next instructions:
- Remove the red, blue, and yellow wires that are connected to the W, U, and V terminal points on the main outdoor PCB.
- Look for continuity across any terminal combination of the V, W, and U spade terminals. You should get an “open circuit” result for all the continuity checks. If not, then replace the outdoor main PCB.
- If all your continuity checks read open circuit, then reconnect the Black-W, Yellow-V, and Blue-U wires. After that, check the DC output.
Now check for >100V-DC between the points given below:
- Positive DC-U and negative DC.
- Positive DC-V and negative DC.
- Positive DC-W and negative DC.
Replace the main outdoor PCB if >100V-DC is not found at any of the test points given above.
Kelvinator air conditioner error code H6
Problem:
This error occurs when the fan of the indoor unit stalls. The standby LED flashes 11 times.
Solution:
Check the refrigerant charge.
Check if the filters of the indoor unit are blocked.
Check if there are any blockages in the refrigeration system.
Check if the evaporator fan is operating properly. If not, then check the 5-pin DC motor connector plug present on the indoor PCB for correct termination.
Check the DC voltage between the yellow and black wires located at the DC motor connector plug.
Following are the readings that should be available for cooling mode:
- Speed 1 = 3.02 Volts DC.
- Â Speed 2 = 3.18 Volts DC.
- Speed 3 = 3.37 Volts DC.
- Speed 4 = 3.54 Volts DC.
- Speed 5 = 3.68 Volts DC.
- Turbo Speed = 4.32 Volts DC.
Following are the readings that should be available for heating mode:
- Speed 1 = 3.33 Volts DC.
- Speed 2 = 3.45 Volts DC.
- Speed 3 = 3.56 Volts DC.
- Speed 4 = 3.66 Volts DC.
- Speed 5 = 4.00 Volts DC.
- Turbo Speed = 4.25 Volts DC.
If you got exactly these readings, however, the indoor fan motor is not working then change the indoor fan motor.
But if you haven’t received these readings while checking the DC voltage between yellow and black wires present at the DC motor connector plug, then replace the indoor PCB to fix the problem.
Kelvinator air conditioner error code HC
Problem:
This error code appears due to the PFC protection of the air conditioner. The heating LED flashes 6 times.
Solution:
Check the supply voltage and make sure it is normal.
Kelvinator air conditioner error code L3
Problem:
This problem occurs when there is an outdoor DC fan motor malfunction. The standby LED flashes 23 times.
Solution:
Check if the condenser fan is operating normally. If not, then check the 3-pin DC motor connection plug for correct termination to the outdoor main PCB.
Kelvinator air conditioner error code LP
Problem:
This problem occurs when the outdoor and indoor units do not match. The standby LED flashes 23 times.
Solution:
Make sure that the outdoor and indoor units are correctly matched.
If you are using outdoor and indoor units from 2 different model types, then you will see the error code LP on the screen.
Kelvinator air conditioner error code P1
Problem:
This problem occurs because of the compressor’s rated frequency test state.
Suggested action:
Set the remote control:
Cooling mode = 18 degrees Celsius
Heating mode = 29 degrees Celsius
Kelvinator air conditioner error code P2
Problem:
This problem occurs because of the compressor’s maximum frequency test state.
Suggested action:
Set the remote control:
Cooling mode = 19 degrees Celsius
Heating mode = 30 degrees Celsius
Kelvinator air conditioner error code P3
Problem:
This problem occurs because of the compressor’s medium frequency test state.
Suggested action:
Set the remote control:
Cooling mode = 17 degrees Celsius
Heating mode = 28 degrees Celsius
Kelvinator air conditioner error code PH
Problem:
This problem occurs because of the high voltage protection of the air conditioner.
Solution:
Check the supply voltage and make sure it is normal. If it is not, turn off the unit and use it when the voltage becomes normal again.
Kelvinator air conditioner error code PL
Problem:
This problem occurs because of the low voltage protection of the air conditioner.
Solution:
Check the supply voltage and make sure it is normal. If it is not, turn off the unit and use it when the voltage becomes normal again.
Kelvinator air conditioner error code PO
Problem:
This problem occurs because of the compressor minimum frequency test state.
Suggested action:
Set the remote control:
Cooling mode = 16 degrees Celsius
Heating mode = 27 degrees Celsius
Kelvinator air conditioner error code U7
Problem:
This error is caused when there is a problem in the 4-way valve.