Things You Should Never Do to Your Aircon

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5 Things You Should Never Do to Your Aircon

Air conditioning is no longer a luxury in the UK—it’s quickly becoming a necessity for homes and businesses. From keeping your house cool in the summer to ensuring your workplace is comfortable for staff and customers, a reliable air conditioner makes life a lot easier. But just like any other appliance, your aircon needs the right care and attention.

At Cool and Clean, we’ve seen how small mistakes can lead to expensive breakdowns, poor efficiency, or even complete system failures. To help you avoid costly repairs and keep your system running smoothly, here are five things you should never do to your aircon.

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1. Don’t Ignore Regular Maintenance

Many people make the mistake of installing their aircon and then forgetting about it. While these systems are designed to last for years, they still need proper servicing.

• Why it matters: Dust, dirt, and debris can build up in the filters and coils. This reduces airflow, forces the system to work harder, and increases your energy bills.

• The risk: Ignoring maintenance can lead to reduced efficiency, frequent breakdowns, and even a shorter lifespan for your air conditioner.

• What to do instead: Book regular servicing at least once a year. At Cool and Clean, we recommend a spring check-up before the hotter months arrive.

Think of it like taking your car for an MOT—preventative care always works out cheaper in the long run.

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2. Don’t Block the Airflow

Your air conditioner needs proper airflow to do its job. Unfortunately, many homeowners unknowingly block the vents or outdoor unit.

• Common mistakes: Placing furniture in front of vents, stacking boxes near the indoor unit, or allowing plants and debris to crowd the outdoor condenser.

• The risk: Restricted airflow causes uneven cooling, forces the system to overwork, and may even result in frozen coils.

• What to do instead: Keep vents and outdoor units clear at all times. Make sure there’s at least two feet of space around your condenser outside, and avoid covering vents indoors.

If you want your aircon to keep your home cool and clean, let it breathe!

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3. Don’t Forget to Change or Clean the Filters

One of the simplest yet most overlooked tasks is replacing or cleaning the filters.

• Why it matters: Filters trap dust, pollen, and other particles, improving your indoor air quality. But over time, they get clogged and reduce the system’s efficiency.

• The risk: Dirty filters force the aircon to work harder, increasing your electricity bills. They can also circulate dust and allergens, which is bad news for anyone with asthma or allergies.

• What to do instead: Check your filters every month. Depending on your system and usage, replace them every 1–3 months, or clean them if they’re reusable.

A clean filter not only keeps your system efficient but also helps maintain fresh and healthy indoor air.

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4. Don’t Set the Temperature Too Low

It might be tempting to set your aircon to the lowest possible temperature on a hot day, but this is a big mistake.

• Why it matters: Air conditioners are designed to cool gradually, not instantly. Setting the temperature too low won’t make your room cool faster—it will just keep the system running longer.

• The risk: Overworking your unit increases wear and tear, wastes energy, and shortens its lifespan.

• What to do instead: Aim for a comfortable temperature, usually between 22°C and 25°C. Use a programmable thermostat if possible, so your system can adjust automatically.

Remember, comfort doesn’t mean freezing—it means maintaining a cool and consistent indoor climate.

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5. Don’t Try DIY Repairs

Air conditioning systems are complex. They involve electrical wiring, refrigerants, and delicate components that require professional handling.

• The risk: DIY repairs can void warranties, cause further damage, or even be dangerous. Mishandling refrigerants can harm both your health and the environment.

• What to do instead: Call a qualified professional like Cool and Clean. Our trained engineers know how to safely diagnose and fix any issues, keeping your system running smoothly.

It’s always safer (and usually cheaper) to let the experts handle repairs than to attempt them yourself.

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Bonus Tip: Don’t Neglect Energy Efficiency

Although not on the main list, one extra mistake to avoid is ignoring energy efficiency. An old, poorly maintained aircon can cost you far more in energy bills than a well-kept or upgraded system.

• Keep doors and windows closed while your aircon is running.

• Use blinds or curtains to block out heat from the sun.

• Upgrade to an energy-efficient system if yours is more than 10 years old.

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Final Thoughts

Your air conditioner is one of the most valuable appliances in your home or office. Avoiding these common mistakes will save you money, extend the life of your unit, and keep your indoor environment fresh, cool, and clean.