LG AC Not Working Repair in Chennai
The AC powers up but does not cool or behaves erratically during operation.
When an LG Dual Inverter or conventional split AC turns on but fails to produce cold air, or shuts down unpredictably mid-cycle, the underlying cause usually lies within its advanced electronic monitoring systems. Modern LG units rely heavily on precise sensor feedback and PCB intelligence. In Chennai's humid coastal environment, high thermal loads combined with power fluctuations often trigger system protection modes, causing the compressor to trip or preventing the outdoor unit from engaging entirely.
Common Symptoms- The indoor display lights up and fan operates, but no cooling occurs
- Error codes such as CH05 (communication error) or CH10 (indoor fan motor fault) flash on the panel
- The outdoor unit makes a clicking sound every few minutes without starting up
- The AC runs for 5 to 10 minutes and then completely shuts off automatically
- The compressor unit turns on briefly and trips the main circuit breaker
- Inverter PCB Control Failure: Sudden voltage spikes in Chennai grids can damage the IPM (Intelligent Power Module) on the LG main circuit board.
- Faulty Dual Inverter Compressor Capacitor/Drive: Failure in the power delivery module prevents the compressor motor from stepping up speed.
- Defective Thermistor Sensors: Incorrect resistance readings from room temperature or discharge pipe sensors cause the system to freeze operations for safety.
- Refrigerant Leakage: Micro-bores in the copper condenser coils drop gas pressure, triggering low-pressure safety cutoffs.
- Diagnostic Scan & Sensor Testing: Our technicians use digital multimeters to check error codes, sensor resistance, and input voltage levels.
- PCB & Electrical Inspection: We check the communication links between indoor and outdoor units and test individual board components for shorts.
- Compressor & Pressure Check: We verify refrigerant standing pressure and measure the operating current (amperage) of the compressor motor.
- Component Replacement & Testing: Faulty sensors, run capacitors, or damaged PCB tracks are replaced using compatible, high-grade spare parts.
- Performance Verification: We perform a full load test, ensuring proper temperature drop and stable operation under peak heat.
Don't let a malfunctioning air conditioner disrupt your comfort. Contact Janani Cool Care for expert LG AC troubleshooting and reliable repairs across Chennai, backed by a 30-day service warranty. Call us now at +91 99410 82878 to schedule a visit from a trained technician.
How Janani Cool Care fixes it
Book online or call
Pick your service, choose a date and time slot, and share your address. We confirm the slot within 15 minutes.
Technician arrives
A verified technician reaches your doorstep at the scheduled time — you are notified when they are on the way.
Diagnosis & transparent quote
The technician inspects the appliance, explains the issue, and shares upfront pricing before any work begins.
Service performed
Work is carried out on the spot wherever possible, using proper tools and genuine spares.
Performance check
The appliance is tested after service to confirm everything works as expected before the technician leaves.
Invoice & 30-day warranty
You get a digital invoice, and your 30-day service warranty starts from the service date.
AC Not Working on other brands
Frequently asked questions
Why is my LG AC turned on, but the outdoor unit is not running?
This usually occurs due to a communication signal failure between the indoor and outdoor PCBs, a tripped thermal overload switch, or a faulty sensor safety trigger. A technician needs to inspect the outdoor inverter board and compressor circuits.
How long does it take to diagnose and repair an LG AC that isn't working?
Most diagnostic checks and standard repairs, such as replacing a sensor or capacitor, take about 1 to 2 hours. If the main PCB requires specialized board-level repair, it may take 24 to 48 hours.
Can I reset my LG AC to fix a complete operation failure myself?
You can try turning off the main power switch for 5 minutes and turning it back on to clear soft electronic errors. However, if the issue persists or error codes reappear, hardware troubleshooting by a technician is required.
Do you provide a warranty on LG AC repairs in Chennai?
Yes, Janani Cool Care offers a 30-day service warranty on all our repair work and replaced components to ensure complete peace of mind.