LG AC Not Cooling / Low Cooling Repair in Chennai
The unit runs but the room barely cools — often low gas, a choked filter or a weak compressor.
LG Dual Inverter air conditioners are engineered for high-efficiency heat exchange, but Chennai's salty air and intense summer heat often trigger cooling degradation. When your LG split or window unit blows lukewarm air or displays an error code like CH38, it indicates the refrigeration cycle is failing to drop indoor temperatures effectively.
Common Symptoms of Poor Cooling in LG ACs- Indoor blower runs continuously, but the room temperature stays warm.
- The indoor display intermittently flashes CH38 (low refrigerant warning) or CH05 (communication fault).
- Ice formation along the copper pipe connections at the outdoor condensing unit.
- The outdoor Dual Inverter compressor starts, makes a straining humming sound, and shuts off quickly.
- Air output from the indoor louvers feels weak, damp, or barely sub-ambient.
- Refrigerant Depletion (R32 / R410A): Micro-punctures on the condenser or evaporator U-bends lead to low gas pressure, tripping the low-pressure sensors.
- Clogged Ocean Black Coated Condenser: Chennai’s humid dust forms a dense sludge over the outdoor fins, preventing adequate heat dissipation.
- Faulty Outdoor BLDC Fan Motor or Capacitor: When the heat transfer fan stalls, compressor head pressure spikes, causing thermal overload trips.
- Inverter PCB Drive Malfunction: Voltage fluctuations can damage the power module (IPM), preventing the compressor from ramping up to higher cooling frequencies.
- Blocked Micro-Dust Filter: Restricted airflow over the evaporator coil leads to poor heat absorption and localized icing.
- Digital Diagnostics: We check LG error memory and measure running pressure and suction line temperature using digital manifolds.
- Nitrogen Leak Testing: If low gas is detected, we isolate coils, apply pressurized dry nitrogen, and braze identified micro-leaks.
- Jet Cleaning & De-scaling: We wash the indoor coil, blower wheel, and outdoor Ocean Black fins using controlled high-pressure water jets.
- Component Servicing: Defective sensors, fan motors, or PCB modules are repaired or replaced using authentic LG-compatible components.
- Gas Top-Up / Recharge: Complete system evacuation with a deep vacuum pump, followed by weight-accurate R32 or R410A charging.
Restore peak cooling performance to your LG AC. Call Janani Cool Care at +91 99410 82878 for expert doorstep diagnostic and repair service anywhere in Chennai.
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 Cooling / Low Cooling on other brands
Other LG AC problems we fix
Frequently asked questions
What does the CH38 error mean on my LG Dual Inverter AC?
The CH38 error indicates that the AC has detected low refrigerant levels. It protects the compressor from overheating by shutting it down until the leak is fixed and gas is refilled.
How much does it cost to fix an LG AC cooling issue in Chennai?
Costs depend on whether the issue is a minor filter clog, capacitor failure, or refrigerant leak requiring coil brazing. Minor services start with an inspection fee, while complete leak fixing and gas refilling depend on current refrigerant market rates.
Can I simply top up the gas if my LG AC is cooling slowly?
No, because AC systems are sealed; low refrigerant always implies a leak. Topping up without finding and brazing the leak will cause the gas to escape again within weeks.
Does Janani Cool Care offer a warranty on cooling repairs?
Yes, we provide a 30-day service warranty on our workmanship and the specific repair carried out by our technicians.