LG AC Coil Problem Repair in Chennai
A dirty, corroded or damaged evaporator/condenser coil kills efficiency and cooling.
Due to Chennai's humid coastal environment, the copper evaporator coils inside your LG Dual Inverter AC are highly susceptible to galvanic corrosion and chemical exposure. When the cooling coil develops pinhole micro-leaks or accumulates salt crust, it directly restricts refrigerant heat exchange, preventing your unit from maintaining lower room temperatures while causing the outdoor inverter compressor to overwork constantly.
Common Symptoms of LG AC Coil Failure- Ice or frost forming rapidly along the aluminum fins of the indoor cooling coil
- Frequent 'CH38' low-refrigerant or gas shortage error codes displayed on the front panel
- Warm air coming from the louvers despite setting the unit to 18°C on Cool Mode
- Distinct oily residue or wet patches near the copper u-bends inside the indoor unit
- Water pooling on the floor due to blocked condensate drainage caused by frozen coils
- Formication Corrosion: Exposure to airborne sulfur and formic acid from coastal moisture reacts with copper tubing, creating micro-cracks.
- Bacterial and Salt Accumulation: High humidity forms a damp sludge over the aluminum fins, trapping salt air and triggering localized pitting.
- Vibration-Induced Friction: Loose mounting brackets or unbuffered copper joints vibrating against the metal chassis during inverter operation.
- Lack of Chemical Servicing: Hardened dust deposits left untreated force high thermal pressure, weakening solder points on the coil u-bends.
- Precision Pressure Inspection: We isolate the LG indoor unit and inject high-pressure nitrogen gas to pinpoint exact micro-leaks using bubble leak detection spray.
- Precision Brazing or Replacement: Minor pinhole leaks are repaired using heavy-duty silver-brazing rods. For extensive corrosion, we replace the entire coil with high-grade 100% copper replacement coils.
- Nitrogen Flushing & Vacuuming: We evacuate moisture and non-condensable gases from the circuit using a dedicated vacuum pump to reach sub-500 micron levels.
- Gas Top-Up & Testing: We recharge exact factory-specified R32 or R410A refrigerant by weight and perform functional thermal testing across all fan speeds.
Don't let a leaking coil damage your LG inverter compressor. Call Janani Cool Care today at +91 99410 82878 to schedule an expert diagnostic inspection and repair 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 Coil Problem on other brands
Frequently asked questions
Can a pinhole leak in an LG AC cooling coil be repaired without replacing the full coil?
Yes, if the leak is confined to one or two accessible u-bends, our technicians can silver-braze the joint and pressure test it with nitrogen. However, if the coil has widespread corrosion, replacing the entire coil block is recommended for long-term reliability.
How long does a typical LG AC coil repair or replacement take in Chennai?
Minor brazing and gas recharging take about 2 to 3 hours on-site. If the coil needs total replacement, the complete process including vacuuming and gas testing takes approximately 3 to 4 hours.
Why does coastal Chennai air cause frequent coil leaks in LG ACs?
Chennai's air contains high humidity and saline content which triggers galvanic corrosion on copper tubes and aluminum fins. Over time, this corrodes weak points near the joints, resulting in micro gas leaks.
Do you provide a warranty on your AC coil repair services?
Yes, Janani Cool Care offers a standard 30-day service warranty on all labor and repair work completed by our technicians.