AC TIPS & ADVICE
Use and selection Practical AC knowledge
Based on manufacturer information and site conditions, learn how to use the AC, judge faults, maintain it, choose a unit and save energy
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Showing articles 625–648 of 702 · Page 27 of 30
Does your AC smell bad? These areas are worth checking
Odours from an air conditioner may be related to dust buildup in the filter, internal moisture, dirt at the air outlet, dust on the blower wheel, or drainage problems
Pros and cons of air conditioning
Using an air conditioner can improve the indoor environment, but it is also important to note that lack of maintenance may lead to air quality and health issues
4 practical ways to reduce dryness caused by air conditioning
Adjusting airflow direction, humidity and cleaning habits can help reduce the dry feeling in an air-conditioned room
Do you need to open windows when using the AC? The difference between cooling and indoor ventilation
Circulating indoor air with a home air conditioner is not the same as bringing in fresh air. Learn how to consider open windows, cooling load and air filtration separately
Improve discomfort caused by using the AC
Regular AC cleaning, humidity control and proper ventilation can improve the air environment in the AC room
Blow-air mode before switching off the air conditioner to prevent mold
Turning on fan mode before switching off helps dry the remaining moisture inside the unit and reduce the chance of mould growth.
Dust buildup causing vibration in the unit
Dust buildup on the internal fan can upset the operating balance, leading to vibration and noise. Regular professional cleaning can help improve this problem.
Cigarette smell from the balcony seeped into the room
Installation gaps or dirt build-up on the unit can allow outdoor odours to seep into the living room; professional cleaning can effectively reduce the source of the odour.
Feeling stuffy after closing the soundproof window? Understand the difference between cooling, dehumidifying, and ventilation
Closing windows indoors and outdoor-unit heat dissipation are not the same issue. A standard home air conditioner cannot replace fresh air supply. Comfort, equipment, and ventilation arrangements should be checked separately.
Dust buildup from air conditioning settling on the TV
Dust accumulated inside the air conditioner duct can spread with the airflow and may cause fine dust to build up on the surface of opposite appliances. Internal cleaning should be carried out regularly
AC smells sour after heavy rain: water ingress, odor sources and shut-down inspection
A sour smell after rain should not be directly assumed to be acid scale or bacteria; if water ingress is suspected, stop using the unit first, and arrange cleaning, drainage and electrical checks separately
How to check temperatures in Hong Kong 18 District? Monthly averages, station differences and AC use
Distinguish Observatory 1991 to 2020 climate averages, individual stations and real-time weather; do not treat one set of monthly averages as 18 district data, and do not assume AC cleaning will always work better in a given month.
Innovation and Future Trends in Hong Kong Air Conditioners
Discuss the technology development trends in Hong Kong's air conditioner industry in energy saving, smart features, and air quality
A detailed buying guide to value-for-money AC units
This article analyzes the key points in choosing a suitable air conditioner from four dimensions: energy efficiency, durability, functions and price
Can an Air Conditioner Be Cleaned with Steam? Material Compatibility and Electrical Limits
Steam is not suitable for all air conditioners, and it does not mean full disinfection or absolute safety for babies or pets; please confirm the manufacturer's requirements, materials, temperature and electrical protection before service
Black Spots at the Air Outlet: Distinguish Dust Build-Up, Materials and Suspected Mold
Black spots do not mean mould or an excessive microbial count has already been confirmed. Learn about safe observation, cleaning limits and leak sources, and avoid spraying chemicals or dismantling the unit yourself.
Does a split unit need cleaning on both the indoor and outdoor sides? Scope on both sides and site restrictions
Indoor cleaning does not mean the outdoor unit is included. Explain the location and access conditions first; residents should only maintain the filter according to the manual, and should not brush the outdoor unit or the inside of the machine themselves.
Why does the AC smell fine at a lower temperature, but give off a sour smell when set up to 25 degrees?
Analyse the causes of a sour smell when the air conditioner temperature is turned up, and provide maintenance and handling suggestions
Why does an air conditioner produce bad odours and mouldy smells? Experts explain the causes and solutions
Explains the common causes of AC odours and the corresponding solutions and maintenance measures
How scented oil grease solidifies dirt inside the AC
Fragrance particles carried into the inside of the AC by airflow can combine with dust to form stubborn greasy deposits, affecting the unit's operating efficiency
What to do if your air conditioner ices up? Common causes and safe handling methods
If airflow becomes weak and the unit freezes up, it does not necessarily mean there is a refrigerant shortage. Stop cooling first, then check the dust filter, airflow and faults; do not keep switching it on and off to test it
White mist or smoke from an air conditioner: first identify the warning signs
White smoke is not necessarily fire, but colour alone cannot be used to judge safety. Learn the limits for stopping use and seeking help when there is a burning smell, sparks, or continuous smoke.
Air conditioner compressor will not start: symptoms cannot replace testing
Air coming out but not cool, a humming sound, or shutting down does not necessarily mean the compressor is broken. Understand what clues you can record, and what to compare when deciding between repair and replacement
How long should you run the air conditioner before resting: use it as needed, and do not switch it on and off frequently
There is no fixed rest time that applies to all air conditioner models. Arrange operating time according to the original manufacturer's usage conditions, room needs and abnormal warning signs