Welcome Car A/C Service is a dedicated car air-conditioning workshop located in Tharamani, Chennai near SRP Tools on 100 Feet Road. We specialize exclusively in car A/C diagnosis, refrigerant gas recharge, leak detection, compressor repair, and full A/C system overhaul. With over 15 years of hands-on experience in automotive HVAC systems, we deliver verified ice-cold cabin comfort.
We offer comprehensive car air-conditioning services including A/C diagnosis, cooling problem resolution, refrigerant gas service, leak detection, compressor repair, system overhaul, evaporator coil cleaning, and electrical sensor diagnosis. Every service begins with a thorough dual-gauge pressure inspection — no guessing, no top-up cans.
Digital dual-gauge pressure scans and laser temperature delta measurement to accurately isolate why the cabin is not reaching target chill.
Resolving cabins that take too long to cool, cut out in traffic jams, or blow warm air during highway driving.
Automated evacuation of old refrigerant, deep moisture vacuum pull, and exact OEM gram-weight recharge with fresh PAG compressor oil.
Systematic multi-stage leak pinpointing using 250+ PSI Oxygen-Free Nitrogen hydrostatic testing and electronic halogen sniffers.
Specialized servicing of the A/C compressor - magnetic clutch air-gap adjustment, internal displacement valve testing, and shaft seal refurbishment.
End-to-end component replacement and closed-loop solvent chemical flushing after mechanical seizure to prevent recurring contamination.
Deep chemical foam disinfection of the cooling coil, unclogging condensation drain pans, and replacing high-efficiency PM2.5 pollen filters.
Diagnostic scan of automotive climate ECU data, ambient/cabin thermistor testing, dual-action radiator fan relay and actuator motor checks.
Car A/C is all we do. We do not service engines, change oil, handle brakes, or work on tyres. Every tool, gauge, and scan tool in our workshop is dedicated to one job: getting your cabin vents to deliver verified ice-cold air. Every vehicle is personally inspected before any work is quoted, and the root cause is what gets repaired.
Typically caused by low refrigerant gas from an undetected leak, a failed compressor clutch, a clogged cabin pollen filter, or a blocked condenser. A physical dual-gauge pressure inspection determines the exact cause.
Automotive A/C systems are hermetically sealed. If gas is dropping, there is an active physical leak in the condenser, evaporator, rubber hoses, or compressor seals that must be repaired before recharging.
We recommend a comprehensive A/C checkup once every 12 months or 15,000 km. This includes condenser fin cleaning, cabin air filter replacement, and operating pressure tests.
Usually points to inadequate airflow through the front condenser. Common causes include a failing fan motor, road dirt clogging condenser fins, or a compressor losing efficiency at lower RPMs.
Often results from evaporator freezing over (faulty thermistor), an expanding magnetic clutch gap slipping when heated, or a high-pressure safety switch tripping due to overheating.
Signs include loud grinding or squealing noises when pressing A/C, oil seepage around the compressor nose seal, burnt belt odor, or failure of the center clutch plate to spin.
Issue: Vent discharge lukewarm at 22°C on hot afternoons; compressor clutch disengaging erratically in traffic.
Diagnosis: Dual-manifold gauges showed high head pressure (320 PSI) due to condenser fin contamination combined with slipped magnetic clutch air-gap.
Solution: Precision ultrasonic condenser cleaning, magnetic clutch shim recalibration to 0.45mm OEM spec, deep nitrogen vacuum & R134a precision recharge.
Result: Restored ice-cold 4.5°C cabin delivery with whisper-quiet clutch engagement and balanced high/low pressures under highway and idle loads.
Issue: Refrigerant emptied twice within 2 months following quick top-ups at non-specialist garages.
Diagnosis: 280 PSI Oxygen-Free Nitrogen hold test combined with electronic halogen sniffing detected a micro-fracture at the lower condenser header tank weld.
Solution: Replaced damaged condenser with OEM spec unit, renewed HNBR rubber O-rings, 45-minute deep moisture vacuum evacuation, and exact 480g R134a recharge with PAG-46 oil.
Result: Guaranteed leak-free closed loop backed by 24h pressure retention test; immediate frost formation at center dash vents.
Issue: Severe metallic grinding noise upon pressing A/C button; engine RPM bogging down under A/C load.
Diagnosis: Seized double-row pulley idler bearing and glazed magnetic clutch friction plate; internal displacement control valve functioning normally.
Solution: Bench-serviced compressor assembly: pressed in new Japanese high-speed NSK pulley bearing, resurfaced clutch drive plate, set air gap, and renewed shaft nose seal.
Result: Saved owner from expensive full compressor replacement; eliminated 100% of engine bay noise with seamless A/C engagement.
Issue: A/C cooling cuts out after 15 minutes of slow city driving; cooling resumes only when cruising at high speed.
Diagnosis: Severe mud and insect debris blinding the lower 60% of condenser micro-channels, causing high-pressure transducer cutoff in traffic.
Solution: Removed front grille for closed chemical foam descaling of condenser fins, radiator separation flush, and high-pressure sensor calibration.
Result: Unrestricted ram-air heat dissipation; steady continuous cooling during peak traffic congestion.
Issue: Engine Rebore
Diagnosis: Diagnostic findings.
Solution: Engine Rebore
Result: Outcome summary.
WELCOME CAR A/C SERVICE is located at Old No: 58, New No: 55, Anna Nagar Colony (100Feet Road), Near SRP Tools, Tharamani, Chennai, Tamil Nadu 600041. Working hours: 9:00 AM – 8:30 PM, Monday – Saturday. Call us at +91 9884465741 or reach us on WhatsApp at +91 919884465741.