Is the air conditioner not cold? Take this 5-minute quick test first
The summer in Taipei and New Taipei is hot and muggy, and the sudden lack of air conditioning is really worrying. However, most conditions can be initially determined through simple inspections to avoid unnecessary maintenance expenses. Please confirm in order:
❄️ 1. Remote control setting confirmation
Check whether the mode is mistakenly set to "air supply" or "dehumidification", whether the temperature setting is too high (recommended 26~28℃ for the most power-saving), and confirm that the timer function is not accidentally activated.
❄️ 2. Filter cleanliness check
Remove the indoor unit filter. If there is obvious dust accumulation or mold, it will seriously affect the air volume and cooling efficiency. It is recommended to clean it every 2 weeks, rinse with water and dry in the shade.
❄️ 3. Heat dissipation condition of the outdoor unit
Observe whether there is accumulation of debris, cover by plants, or dust on the cooling fins around the outdoor unit. Poor heat dissipation will cause the compressor to be overloaded and the cooling effect will be greatly reduced.
❄️ 4. The refrigerant pipe is frosted or dripping abnormally
If the copper pipe is severely frosted or the indoor unit is dripping a lot, it may mean that the refrigerant is insufficient, the drainage pipe is blocked or the installation is tilted, and professional maintenance is required.
❄️ 5. Confirmation of electrical load and voltage
If the voltage is unstable during peak power consumption periods, it may affect the starting efficiency of the air conditioner. You can observe whether other electrical appliances are abnormal at the same time, or contact Taipower customer service (1911) to check the regional power supply status.
Need a master: If there is still no improvement after cleaning, you may need to deep clean or replace the fan assembly
🔧 Problem 2: The air conditioner is running but the room temperature cannot drop
• Possible reasons: refrigerant leakage, compressor efficiency decrease, excessive indoor and outdoor temperature difference
• Self-treatment: close the doors and windows, draw the curtains to reduce the heat source, and confirm that the outdoor unit has sufficient cooling space
• A master is required: professional equipment is required for refrigerant detection and replenishment, do not add it by yourself
🔧 Problem 3: Odor, noise or water leakage
• Possible reasons: Internal mold, blocked drain pipe, installation tilt or loose parts
• Self-handling: Turn on the "air supply" mode regularly to dry the interior, and check whether the drain pipe outlet is smooth
• A master is needed: professional skills and tools are required for disassembly, cleaning, correction and installation or replacement of parts
Do it yourself vs. "hire a master" cost-benefit analysis for air-conditioning cleaning
🧼 DIY basic cleaning
• Cost: Filter cleaner costs about 100 to 300 yuan, and tools (soft brushes, spray bottles) can be reused
• Suitable for: monthly routine maintenance, filter and housing cleaning, air outlet dust removal
• Limitations: unable to clean the internal evaporator, wind wheel and refrigerant system, the effect of deep soiling is limited
👨🔧 Professional deep cleaning
• Cost reference:
- Window air conditioner: 2,500~3,500 yuan/unit (small tonnage)
- Split air conditioner: 3,000~5,000 yuan/unit (including indoor and outdoor units)
- Annual maintenance plan: Some operators offer 2 cleaning discounts, which is more cost-effective in the long term
• Advantages: Use professional equipment (high-pressure cleaner, disinfectant spray) to remove internal mold and slime, restore air volume and cooling efficiency, and detect potential faults
💡 Recommended strategy: Clean the filter by yourself every month, and commission a professional deep cleaning once a year before summer, taking into account both effectiveness and cost.
Power-saving tips: Summer air-conditioning setting + maintenance timing
• The temperature setting of 26~28℃ is the most energy-saving, and every 1℃ higher can save about 6% of electricity
• Use it with an electric fan to promote air circulation, and the body temperature can be reduced by 2~3℃
• There is no need to turn off the air conditioner within 30 minutes after going out. Frequent starting will consume more power (especially inverter models)
• Regularly cleaning the radiating fins of the outdoor unit to maintain heat exchange efficiency can save 5 to 10% of electricity
• When not in use for a long time, turn off the power and put on a dust cover to extend the life of the unit
Mastering inspection skills and maintenance rhythms can not only maintain the best performance of the air conditioner, but also intelligently control electricity expenses. If you encounter an abnormality that cannot be determined, it is recommended to give priority to professional services that provide test reports and warranty commitments to ensure safety and rights.
New knowledge on air-conditioning power consumption and Taiwan climate maintenance regulations in recent years (2025-2026 current situation)
With the high temperatures in summer breaking historical records and the adjustment of electricity price structure in recent years, the latest statistics from the Energy Administration of the Ministry of Economic Affairs show that air-conditioning equipment accounts for more than 47% of residential electricity consumption in summer. Many people mistakenly believe that if the air conditioner is not cold, they only need to "replenish the refrigerant." However, in fact, refrigerant is not naturally consumed during normal operation in a closed circuit. If the refrigerant is insufficient, it means that there are micro leaks in the copper pipes or joints. Simply replenishing the air conditioner will only treat the symptoms but not the root cause. Refrigerant leakage will aggravate the high temperature overload of the compressor and shorten its service life.
According to Taiwan's standard operating specifications for air-conditioning projects, it is recommended that professional technicians with a refrigeration and air-conditioning decoration technician license perform "full machine high-pressure water washing and evaporator deep sterilization" every 1 to 2 years for detached air-conditioning indoor units. Especially in the humid summer in the Shuangbei Basin, the air drum and water collection tray are easy to breed black mold and jelly-like biofilm. This is also the main reason for the sour smell in the air-conditioning outlet and the backflow of the drainage pipe. Regular maintenance can maintain CSPF (Air Conditioning Seasonal Performance Factor) level one energy efficiency level, which can save an average household 15% to 20% of air conditioning electricity bills every year.
Autonomous simple maintenance vs professional maintenance safety red line
- Homeowners can do by themselves: Remove and clean the nylon filter regularly every 2 to 3 weeks (rinse with clean water and dry in a cool place, do not expose it to the sun to avoid deformation and embrittlement); clean the air outlet blades of the indoor unit with a dry cloth; check whether there is any accumulation of debris within 50 cm around the outdoor unit that hinders heat dissipation.
- Professional technicians must be entrusted according to regulations: Refrigerant pressure testing and leakage repair welding, high-pressure cleaning of indoor unit air drums and aluminum fins with liquid chemicals, reset of the drainage slope of hidden cold water pipes in the ceiling, and 220V dedicated power circuit configuration and leakage circuit breaker replacement.
