The longevity of your unit is primarily determined by:

• Quality and Frequency of Maintenance: This is the most critical factor. Regular professional servicing (recommended every 3-6 months) prevents wear and tear.
• Usage Patterns: A unit that runs 24/7 will have a shorter lifespan than one used only at night. The number of hours of operation directly impacts its longevity.
• Installation Quality: A poor installation with incorrect refrigerant charging, improper levelling, or poor wiring can cause irreversible damage and significantly shorten the unit’s life.
• Brand and Quality: Units from reputable brands with better components (e.g., compressors) are often built to higher standards and last longer.
• Environmental Factors: Proximity to the sea (salty, corrosive air) or construction sites (dust and debris) can accelerate deterioration.

Consider aircon replacement if you notice several of these signs:

• Frequent and Costly Breakdowns: Repair costs are approaching 50% of the value of a new unit.
• Consistently Poor Cooling Performance: Even after professional servicing and topping up of gas.
• Strange and Persistent Noises: Such as grinding, screeching, or rattling from the compressor.
• Rising Energy Bills: A significant, unexplained increase in your electricity bills indicates falling efficiency.
• Age: If your unit is over 10 years old and experiencing issues, it’s often more economical to invest in a new, more energy-efficient model.

Absolutely, yes. Think of servicing like a car’s regular oil change. It prevents major failures. Professional cleaning prevents the compressor from overworking, ensures proper refrigerant levels, and keeps electrical components in good condition. Neglecting service leads to dirt buildup, which strains the system, reduces efficiency, and causes premature failure of expensive parts like the compressor.

While it may still function, an older unit is likely highly inefficient. Modern inverters are significantly more energy-efficient. Replacing a 10-year-old unit with a new 5-tick energy-efficient model can reduce your energy consumption by 30-40% or more. The savings on your monthly electricity bills can often justify the cost of a new unit within a few years, making replacement a financially smart decision.

Yes. Established brands like Daikin, Mitsubishi Electric, Mitsubishi Heavy Industries, and Panasonic have a reputation for manufacturing units with high-quality compressors and components designed for reliability and durability. While they may have a higher upfront cost, they often prove more cost-effective in the long run due to their longer lifespan and better performance.

A unit in a constantly occupied home office running 12+ hours a day will experience more wear than one in a bedroom used only for 8 hours at night. Commercial systems, which run nearly 24/7, have even shorter expected lifespans. If your usage is very high, investing in a commercial-grade unit and more frequent maintenance (quarterly) is advisable.

Repair if the unit is under 7 years old, the repair is minor (e.g., capacitor, fan motor), and it has been well-maintained. But replace if the unit is over 10 years old, requires a major repair (especially a compressor replacement), or your energy bills are climbing steadily. A new compressor can cost over half the price of a new unit.