Each summer, many people experience musty odors, weak cooling, or even water leakage from their air conditioners. In most cases, these problems stem from inadequate cleaning — and proper maintenance should go far beyond just washing the dust filter. More concerningly, some cleaning companies may only provide “surface cleaning,” resulting in disappointing results despite high charges.
This article breaks down the three major pain points when choosing an AC cleaning service, helping you identify a reliable company and avoid post-cleaning issues like odors or leakage.
Common AC Cleaning Issues and Causes
Musty Odor
After the unit is turned off, internal moisture remains trapped, allowing dust and mould to accumulate in the damp environment, creating unpleasant smells. When selecting a cleaning service, don’t just ask whether the filter is cleaned — make sure the service covers key components such as the evaporator coil, drainage pipe and fan blower, where dirt often collects.
Weak Cooling & Increased Power Consumption
A dirty blower wheel or evaporator obstructs airflow, making the unit work harder to produce cool air, which raises energy consumption. Regular, professional deep cleaning ensures smoother operation and improved energy efficiency.
Family Health Concerns
Mould spores and dust mites can circulate through the air, triggering allergies, asthma, and respiratory irritation. If your household includes children, seniors, or those with sensitive airways, it’s particularly important to choose a cleaning company that clearly explains its cleaning coverage, disinfection methods, and safety measures — and whether drainage components will also be cleaned to reduce the chance of mold regrowth or water leakage.
How to Choose an AC Cleaning Company: 7 Key Criteria
Use the following selection criteria as your checklist when comparing companies:
1. Transparent pricing: Are pricing details clearly listed by model or horsepower, including common surcharges?
2. Clear cleaning process: Are the cleaning steps and covered areas explained in detail rather than vaguely summarized?
3. Pre-cleaning inspection: Does the technician check the unit’s condition beforehand and confirm with you if issues are found?
4. Proper site protection: Are waterproofing and anti-contamination measures in place to keep your home clean afterward?
5. Quality assurance: Is there a testing or inspection checklist for you to verify after completion?
6. Customer feedback and cases: Are genuine before-and-after examples or client reviews provided?
How Are AC Cleaning Prices Calculated?
Differences in pricing usually depend on the model type, complexity, cleaning scope, and site conditions.
- Model type: Prices typically start from HKD 900 to HKD 1,900 and vary depending on whether the unit is a window-type, split-type, ducted, or ceiling-mounted system — more complex structures generally cost more.
- Condition and size: Dirt accumulation, years since last cleaning, and additional dismantling time affect cost.
- Access and location: Remote areas, holidays, high ceilings, or difficult-to-reach installations may require extra arrangements.
To prevent disputes over added charges, it’s best to share photos of your unit and installation area before booking. Ask the provider to specify what the quoted price includes and list potential additional fees. Johnson Group will conduct a preliminary assessment based on your photos and explain the cleaning scope and precautions prior to service.
How to Tell Surface Cleaning from Deep Cleaning?
One of the most effective ways to identify a trustworthy cleaning service is by evaluating process transparency — whether they clearly detail cleaning coverage, cleaning solutions used, home protection measures, and inspection procedures. Avoid services that only wipe the exterior and rinse the filter.
Watch the video below to see Johnson Group Professional Air Conditioner Deep Cleaning workflow and post-cleaning inspection highlights. You can use the mentioned criteria to verify for yourself:
Johnson Group uses a standardized seven-step cleaning procedure, carefully executed to eliminate mould, dust mites, and grime thoroughly.
For more details on cleaning frequency and maintenance tips, check out: Air Conditioner Cleaning Guide｜How Often Should You Clean? Full Steps and Maintenance Tips
Professional Air-Conditioner Cleaning & Sanitizing Service
Enjoy an exclusive offer with Johnson Group Professional Air-Conditioner Cleaning & Sanitizing Service — spend HKD 2,000 or more and receive two bottles of SmellGREEN® Natural Cleaning Disinfectant (100ml); spend HKD 3,800 or more and get four bottles!
Gifts will be delivered on the day of service. Limited quantities available — while stocks last!
