HW Car Tuning is based at Proficient Industrial Centre, Wang Kwun Road, Kowloon Bay, and received a 2025 Asian award for outstanding automotive air-conditioning services. We specialise in air conditioning, refrigerant charging, engine repairs, diagnostics, batteries, oil changes and vehicle inspections. Free on-site air-conditioning checks, clear quotations before repairs, and service every day.
HW Car Tuning Limited is a vehicle repair workshop at Units A7 & A8, G/F, Block A, Proficient Industrial Centre, 6 Wang Kwun Road, Kowloon Bay, Hong Kong. We specialise in automotive air-conditioning repairs and also provide engine repairs, computer diagnostics, battery replacement, engine oil and fluid changes, filter replacement and annual inspection arrangements as part of our complete vehicle repair and maintenance services。
Modern vehicle repairs require advanced tools as well as experienced technicians. Our fully automatic air-conditioning cleaning equipment supports a diagnosis-first approach: we inspect, explain the quotation and obtain approval before starting, avoiding unnecessary parts replacement. At Asia’s Most Valuable Corporate Awards 2025, the workshop received the award for outstanding professional automotive air-conditioning services. The premises also hold EMSD registration for low-voltage electric-vehicle work.
Whether the air conditioning is not cooling, the engine makes unusual noises, a dashboard warning light appears or an inspection is due, describe the issue through WhatsApp for advice from our team. For our background, certificates and milestones, see About HW Car Tuning。
Professional service and specialist expertise. From air-conditioning and engine repairs to diagnostics, batteries, oil changes and inspection arrangements, we care for your vehicle in one place.
Refrigerant pressure checks, condenser cleaning, evaporator disinfection, pipe flushing and fault diagnosis; a 2.5-hour automatic closed-loop cleaning process, deep evacuation and accurately measured oil and refrigerant charging. Free on-site system inspection.
Air-conditioning service details →For unusual noises, oil leaks, stalling, poor acceleration, smoke or increased fuel consumption, technicians check spark plugs, coils, injectors, timing components and cylinder compression to identify the underlying cause before repair.
Engine repair details →Diagnostic equipment reads fault codes and live data to locate engine, transmission, ABS, airbag and body-electronics issues. We investigate dashboard warning lights rather than replacing parts by guesswork.
Diagnostic service details →For flat batteries, difficult starting or dim lights, we test battery health, alternator output and starter operation. AGM, EFB and conventional batteries are available, with ECU battery registration where required.
Battery replacement details →Engine oil, transmission fluid, differential oil, brake fluid and power-steering fluid changes, plus fuel, air, cabin and oil filters. Our recommended engine oil is Italian-made Pakelo, used with proper replacement procedures to protect your engine.
Oil and fluid service details →A comprehensive pre-inspection covering lights, brakes, tyres and emissions, with filter replacement where necessary. We then arrange the inspection to improve first-time readiness and save you time.
Annual inspection service details →
Still sweating with the air conditioning at maximum? Hearing a clicking noise as the compressor starts? The issue may involve compressor oil rather than refrigerant alone. This oil lubricates the compressor, helps seal the system and carries heat away. Over time it can absorb moisture, oxidise and deteriorate, so it needs attention just like engine oil.
Simply adding refrigerant leaves old, dark compressor oil and contaminants in the system. Our automatic cleaning equipment performs closed-loop flushing, evacuation, leak testing and precisely measured refrigerant and oil charging over approximately 2.5 hours, without manual dismantling for the cleaning process.
A vehicle air-conditioning system is a closed circuit. Refrigerant should not normally be consumed. If you notice the following symptoms, arrange a free air-conditioning system check so the cause can be identified before repair.
Possible causes include refrigerant leaks, a worn compressor, a dirty condenser or a blocked expansion valve. High- and low-pressure readings and vent temperatures are needed for diagnosis.
This may involve unstable system pressure, pressure switches, relays, control circuits or a slipping compressor clutch. Electrical controls and compressor engagement should be checked.
Mould on the evaporator or a dirty cabin filter is often responsible and can cause discomfort or allergies. Cabin-filter replacement and evaporator cleaning may be needed.
Clicking as the compressor starts may indicate poor lubrication from deteriorated oil or internal wear. Early attention may prevent further damage and complete compressor replacement.
A heavily blocked cabin filter, faulty blower or electronic control issue may be responsible. Filter and blower checks help identify the cause.
Reduced air-conditioning performance can impair demisting and visibility. Check the system before the rainy season to ensure effective operation.
For compressor replacement, refrigerant leak detection, condenser and evaporator repairs, visit our air-conditioning specialist page, or browse our air-conditioning workshop photographs。
Cleaning, evacuation, leak testing and accurately measured oil and refrigerant charging all matter. Each step needs sufficient time to achieve a reliable result.
Check system pressures and vent temperature, assess the compressor, condenser and electrical controls, then provide a clear quotation.
Recover old refrigerant and evacuate the system thoroughly to remove moisture and air, keeping the circuit dry.
A thorough 2.5-hour automatic closed-loop process removes deteriorated compressor oil without cutting corners.
Add precisely measured fresh high-performance compressor oil and refrigerant to factory specifications, then perform an operational test.
We recommend air-conditioning inspection and cleaning every 30,000 km or annually, whichever comes first, including refrigerant-pressure checks, cabin-filter replacement and cooling-fin cleaning.
Book a free air-conditioning check on WhatsAppVerifiable credentials, dependable service and the trust of vehicle owners. Our workshop combines professional certifications, modern equipment and practical experience.
Recipient of the outstanding professional automotive air-conditioning service award at Asia’s Most Valuable Corporate Awards 2025.
The premises hold EMSD registration for low-voltage electric-vehicle work. Technician Mr Lau has also completed low-voltage EV maintenance training.
Automatic air-conditioning cleaning and computer diagnostic equipment support experienced technicians in resolving problems efficiently.
Free on-site air-conditioning inspection, a clear quotation and your approval before work begins. The complete 2.5-hour cleaning process is performed without cutting corners.
Regular maintenance is a cost-effective choice. Waiting for a breakdown can multiply repair costs and compromise driving safety.
Monday–Saturday, 9:30 am–7:00 pm; Sundays and public holidays, 10:00 am–4:00 pm. Contact us to arrange an appointment.
For photographs of our premises, certificates and repair work, visit our workshop and certificates.
Follow the vehicle manufacturer’s service schedule and adjust for driving conditions. These are common maintenance items that our Kowloon Bay workshop can handle in one visit.
Louder engine noise, reduced performance, increased fuel consumption and sluggish acceleration may indicate a need for maintenance. Common reference intervals are around 5,000 km for mineral oil and 7,000–10,000 km for semi-synthetic oil. Frequent congestion or short trips may require earlier changes.
Pakelo oil-change service →Transmission and differential oils lubricate drivetrain components. Brake fluid absorbs moisture, lowering its boiling point and affecting braking. Power-steering fluid supports steering assistance. Check and replace these fluids according to the manufacturer’s recommendations.
Vehicle fluid services →Air filters clean air entering the engine, fuel filters remove fuel contaminants, and cabin filters affect airflow and interior air quality. Blocked filters can reduce engine or air-conditioning efficiency.
Filter replacement services →Batteries are consumable components. Slow starting, dim lights and unstable voltage can indicate ageing. Start-stop vehicles typically require AGM or EFB batteries, and some need ECU battery registration after replacement.
Battery testing and replacement →Check and clean the air-conditioning system every 30,000 km or annually, whichever comes first, including refrigerant-pressure checks, cabin-filter replacement and cooling-fin cleaning to help extend compressor life.
Air-conditioning maintenance and cleaning →If engine, ABS or airbag warning lights appear, arrange computer diagnostics to inspect fault codes and live data. Do not simply erase the codes without identifying the cause.
Diagnostics and warning-light checks →
According to Hong Kong government guidance, private cars manufactured six or more years before licensing require annual inspection at a designated vehicle examination centre before licence renewal. Centres accept bookings within four months before licence expiry. Arrange this early to allow time for repairs or re-examination.
HW Car Tuning provides annual vehicle inspection arrangements, including pre-inspection checks and preparation before the examination. Before long cross-border journeys, check air conditioning, fluids, batteries, brakes and tyres for greater peace of mind.
Our Wang Kwun Road workshop is convenient for motorists in Kowloon Bay, Kwun Tong, Ngau Tau Kok, Kai Tak and East Kowloon. Drivers from all districts are welcome to book.
Units A7 & A8, G/F, Block A, Proficient Industrial Centre, 6 Wang Kwun Road, Kowloon Bay, Hong Kong. For a map and directions, see our Contact and bookings page.
Monday–Saturday: 9:30 am–7:00 pm. Sundays and public holidays: 10:00 am–4:00 pm. Open every day.
Call 61889798、WhatsApp 61889798, or complete our online booking form。
“The air conditioning cooled properly again after cleaning. The technician explained the whole process clearly, and the price was reasonable.”
“The diagnostic test found the problem quickly, without replacing parts by guesswork. I have recommended the workshop to friends.”
“The inspection service was convenient. Everything was arranged through WhatsApp, and Sunday opening was particularly helpful.”
These are some of the questions our customers ask most often. For more air-conditioning advice, see our air-conditioning FAQs。
HW Car Tuning is at Units A7 & A8, G/F, Block A, Proficient Industrial Centre, 6 Wang Kwun Road, Kowloon Bay, Hong Kong. We open Monday–Saturday, 9:30 am–7:00 pm, and Sundays and public holidays, 10:00 am–4:00 pm. Call or WhatsApp 61889798 to book.
Our on-site air-conditioning inspection is free. We provide a clear quotation afterwards and begin repairs only with your approval. Please call or WhatsApp 61889798 before visiting so we can arrange a suitable time.
Air conditioning operates as a closed circuit, so refrigerant is not normally consumed. If cooling deteriorates soon after charging, there may be a leak, a fault in the compressor, condenser, expansion valve, blower or electrical controls, or deteriorated compressor oil. Pressure and temperature checks should identify the cause before a repair is chosen.
The process includes recovering old refrigerant, deep evacuation to remove moisture and air, closed-loop cleaning to remove dark old oil, leak testing and accurately measured fresh oil and refrigerant charging. Automatic equipment performs the closed-loop cleaning without manual dismantling, taking approximately 2.5 hours.
Hong Kong government guidance requires private cars manufactured six or more years before licensing to undergo annual inspection at a designated centre before licence renewal. Bookings are accepted within four months before licence expiry. We provide pre-inspection checks and preparation, then arrange the examination.
Follow the manufacturer’s handbook, taking oil specification and driving conditions into account. Common reference intervals are around 5,000 km for mineral oil and 7,000–10,000 km for semi-synthetic oil; many modern vehicles specify around 10,000 km. Frequent congestion or short trips may require shorter intervals. Our recommended engine oil is Italian-made Pakelo.
An ageing battery is a common cause, but inadequate alternator charging or a faulty starter may also be responsible. We test battery health, alternator output and starter operation before replacement. AGM, EFB and conventional batteries are available, with ECU registration where required.
The workshop holds EMSD registration for low-voltage electric-vehicle work, and Mr Lau has completed low-voltage EV maintenance training. Please call or WhatsApp to confirm whether your model and the required service fall within our scope.
Before a long trip, check air conditioning, engine oil and other fluids, batteries, brakes, tyres and lights. Our free on-site air-conditioning inspection can be combined with oil changes, filter replacement and computer diagnostics.
We also provide engine repairs, computer diagnostics, battery replacement and electrical repairs; engine, transmission, differential, brake and power-steering fluid changes; fuel, air, cabin and oil filters; and annual vehicle inspection arrangements.
Speak directly with our team for advice and appointments. Call 61889798 or WhatsApp 61889798
Contact and bookings