When summer heat returns Gold Coast, many homeowners wonder: is it safe to use old air conditioner units that have been sitting idle for months or even years? The short answer: it depends on how well the system has been maintained. While older air conditioners can still function, neglecting them can pose health risks, reduce comfort, and drive up energy bills. Let’s explore the risks, how they affect you, and what you can do to make your old unit last longer.
Table of contents
Can you get sick from an old air conditioner?
Yes, you can. According to The Conversation, an aging or poorly serviced system can harm indoor air quality in ways that affect health:
- Bacterial and mold growth: Dust and moisture trapped in coils and filters provide breeding grounds for harmful microorganisms.
- Respiratory irritation: Old filters clog easily, circulating dust, pollen, and allergens that worsen asthma or allergies.
- Sick building syndrome: Symptoms like headaches, fatigue, and nasal congestion often trace back to contaminated HVAC systems.
- Fire and chemical risks: Worn wiring and outdated refrigerants in very old models can pose fire hazards or environmental concerns.
On the Gold Coast, where humidity levels are high, these risks can be amplified if preventative maintenance isn’t performed regularly.
How to make your old air conditioner work better
If you’re not ready to replace your system, there are practical steps you can take to improve performance and safety. Here are expert-backed tips:
1. Change filters frequently
Older systems collect dust faster. Replace filters every 2–3 months to maintain airflow and protect air quality.
2. Clean around outdoor units
Clear away grass, weeds, and debris within a 2–3 foot radius so condenser coils can release heat properly.
3. Check and flush drain lines
Clogged drain lines can freeze coils or encourage mold. Pour a bleach-water solution down the line every few months.
4. Inspect and insulate ducts
Cracks or poor insulation waste energy. Professional duct resealing on the Gold Coast can quickly boost efficiency.
5. Reseal windows and doors
Air leaks force your AC to work harder. Caulking and weather stripping improve cooling and lower power bills.
6. Clean coils and vents
Dusty coils and vents reduce heat transfer. Gently clean them each spring before the cooling season.
7. Use a programmable thermostat
Set your thermostat around 25–26°C during the day and adjust it at night for energy savings.
8. Schedule preventative maintenance with DEEPCHILL
Nothing extends the life of an old air conditioner more than regular servicing. On the Gold Coast, DEEPCHILL has been trusted since 1986 to deliver thorough preventative maintenance for both residential and commercial systems. Our certified technicians don’t just replace filters, we inspect electrical connections, flush drain lines, clean coils, and calibrate thermostats to ensure your unit runs safely and efficiently.
Homeowners who book preventative maintenance with DEEPCHILL twice a year often enjoy:
- Fewer unexpected breakdowns during summer
- Lower energy bills thanks to improved system efficiency
- Cleaner indoor air with reduced dust and allergens
- Longer equipment lifespan before replacement is needed
By scheduling regular visits with DEEPCHILL, you’re not only protecting your old air conditioner but also your comfort, safety, and long-term savings.
When to replace instead of repair
Even with maintenance, no unit lasts forever. Most air conditioners run for 12–15 years. Signs you may need replacement include:
- Frequent repairs (more than twice a year)
- Unusual noises or burning smells
- Rising energy bills despite servicing
- Leaks or coolant loss
If repair costs approach half the price of a new system, upgrading or recycle become the smarter choice.
In conclusion, you can safely use old air conditioner units if you keep them clean, well-maintained, and professionally serviced. But ignoring issues can put both your health and your wallet at risk. For Gold Coast homeowners, the best way forward is clear: invest in preventative maintenance from trusted local air conditioning experts to keep your old unit running safely and know when it’s time to replace it.
