Aircon Not Cooling?

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Aircon Not Cooling? Common issues & Solutions

Aircon Not Cooling

On a hot day, there are few things more annoying than turning on your air conditioner only to discover that it is pumping warm air. You are not alone if your Aircon isn’t cooling; this is one of the most frequent problems that homeowners have with their air conditioner.

Actually, research indicates that avoidable problems like clogged filters, insufficient refrigerant, or ignored maintenance↗ account for 65% of air conditioning breakdowns. You may save time, money, and suffering by being aware of these issues and how to solve them.

We’ll investigate the causes of mediocre AC performance in this blog, offer workable fixes, and even share a real-world example of how preventative maintenance resolved a serious cooling problem.

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Top Reasons Why Your Aircon Is Not Cooling

 

1. Clogged Air Filters (47% of Cooling Issues)

Dirty or clogged air filters restrict airflow, preventing your air conditioner from circulating cool air effectively. Over time, this buildup forces the system to work harder, reducing cooling efficiency by up to 25%.

Solution:

  • Check your filters monthly and clean or replace them every 1–3 months, depending on usage.

2. Low Refrigerant Levels (15% of Cases)

Refrigerant is the lifeblood of your air conditioning system. Leaks or insufficient levels can disrupt the cooling cycle, leaving you with warm air.

Solution:

  • Have a certified technician inspect and recharge your refrigerant. Look for leaks before refilling to avoid recurring problems.

3. Faulty Thermostat Settings (8% of Issues)

Sometimes, the problem isn’t mechanical but simply a case of incorrect thermostat settings. For instance, switching the thermostat to “Fan” mode instead of “Cool” can result in warm air circulation.

Solution:

  • Double-check that your thermostat is set to “Cool” and programmed to the desired temperature.

4. Dirty Evaporator or Condenser Coils (20% Performance Loss)

Dirt and debris on the evaporator or condenser coils can block heat exchange, reducing the unit’s cooling capacity by up to 20%.

Solution:

  • Clean the coils annually or have a professional handle deep cleaning during scheduled maintenance.

5. Blocked or Leaky Ductwork (10% Energy Loss)

For central air conditioning systems, leaks or blockages in ductwork can cause cool air to escape before it reaches your living space.

Solution:

  • Inspect ducts for visible damage or obstructions. Seal leaks with duct tape or professional-grade sealants.

What to Check Before Calling a Technician

➜ Power Supply: Ensure the unit is plugged in and the circuit breaker hasn’t tripped.

➜ Outdoor Unit: Check for obstructions like leaves or debris around the condenser.

➜ Fan Blades: Look for visible damage or dirt buildup affecting rotation.

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A Real-Life Example: How Proactive Maintenance Saved the Day

Case Study: A London café faced a crisis when their aircon stopped cooling during a summer heatwave, with indoor temperatures soaring to 30°C.

The Problem:

  • After inspection, we found a clogged filter and low refrigerant levels.

The Solution:

  • Replaced the clogged filters, improving airflow by 40%.
  • Recharged refrigerant, restoring the cooling capacity to 100%.

The Outcome:

The café experienced an immediate temperature drop of 8°C, with energy savings of 15% due to reduced strain on the system.

How Regular Maintenance Can Prevent Cooling Issues

Did you know that regular maintenance can reduce the likelihood of your aircon not cooling by up to 75%? Here’s how:

  • Filter Cleaning: Prevents airflow restrictions that lead to inefficiency.
  • Coil Inspection: Ensures optimal heat exchange, reducing energy consumption by 10–15%.
  • Refrigerant Checks: Keeps your system running at peak performance.
Air Conditioning Maintenance

Out-of-the-Box Tips to Maximise Cooling Efficiency

➜ Use Curtains or Blinds: Block sunlight to reduce the room temperature by up to 4°C, easing the workload on your aircon.

➜ Upgrade to Smart Thermostats: Studies show that smart thermostats can improve cooling efficiency by 23%.

➜ Check Insulation: Proper insulation prevents cool air from escaping, increasing efficiency by up to 30%.

The Cost of Neglecting Cooling Issues

Ignoring cooling problems can lead to:

  • 𐄂 Higher Bills: A struggling unit can increase energy costs by up to 35%.
  • 𐄂 System Failure: Small issues left unresolved often lead to costly repairs or replacements.
  • 𐄂 Poor Air Quality: Dust and allergens may circulate, causing health concerns.
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When to Call a Professional

If your aircon is still not cooling after trying basic troubleshooting steps, it’s time to bring in an expert. Look for these warning signs:

  • Frequent short cycling (turning on and off rapidly).
  • Unusual noises or odors from the unit.
  • Consistently higher energy bills without increased usage.
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An aircon not cooling can be frustrating, but understanding the causes and solutions can help you resolve the issue quickly. From clogged filters to refrigerant leaks, addressing these problems early ensures your system remains efficient and your space stays comfortable.

Regular maintenance and proactive care are the best ways to prevent future cooling issues. Don’t wait until a hot day to fix your aircon – take action today for peace of mind tomorrow.

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FAQs About Aircon Not Cooling

Warm air may indicate low refrigerant, dirty filters, or a malfunctioning compressor.

Filters should be cleaned or replaced every 1–3 months, depending on usage.

No, refrigerant handling requires professional certification due to environmental regulations.

With proper maintenance, most aircon units last 10–15 years.

Yes, but if it takes excessively long, there might be issues with airflow or refrigerant levels.

AC Smells Musty? Here’s What You Need to Know and How to Fix It

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AC Smells Musty? Here’s What You Need to Know

A musty odour coming from your AC can be more than just a nuisance; it’s typically an indication of underlying problems that need to be addressed. Whether you have a faint, damp scent or a more intense mildew stench, recognising the reasons and treatments for a musty-smelling AC can help you breathe fresher air and maintain your AC system in good working order.

women reacting to ac smelling musty

Types of AC Smells and What They Mean

Your AC can produce a variety of smells, each indicating a specific issue. Identifying the smell can help you determine the problem and address it promptly:

1. Musty Smell

  • What it Means: Indicates mould or mildew growth, often due to blocked drain lines, dirty filters, or high humidity.
  • Potential Problems: Poor indoor air quality, respiratory irritation, and decreased system efficiency.

2. Burning Smell

  • What it Means: Could signal an overheating motor, electrical issue, or a dirty blower.
  • Potential Problems: Fire hazards, equipment damage, and unsafe operation.

3. Rotten Egg Smell

  • What it Means: Often caused by a dead animal trapped in the ductwork or system.
  • Potential Problems: Unpleasant odour, health risks, and potential contamination of your ductwork.

4. Chemical Smell

  • What it Means: Might indicate refrigerant leaks or chemical buildup inside the unit.
  • Potential Problems: Health risks from inhalation and inefficient cooling performance.

5. Smoky Smell

  • What it Means: Indicates an issue with electrical components or wiring.
  • Potential Problems: Electrical hazards, potential system failure, and safety concerns.

6. Sewer Smell

  • What it Means: Caused by a dry or clogged condensate drain that allows sewer gases to escape.
  • Potential Problems: Health risks from exposure to harmful gases and lingering odours in your home.

By recognising these smells and addressing the underlying causes, you can prevent further damage, improve indoor air quality, and ensure your AC operates safely and efficiently.

If you’re unsure about a smell or how to resolve it, it’s best to consult a professional.

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Why Does Your AC Smell Musty?

A musty smell from your AC usually means mould or mildew is present. Here’s why it might happen:

  • Blocked Drain Lines
    Condensation drains through a pipe, but if it’s blocked, moisture builds up and creates the perfect spot for mould to grow.

  • Dirty Air Filters
    Dusty filters trap moisture, making it easy for mould to form. The musty smell then spreads through your home as air passes through.

  • High Humidity in Ducts
    Excess moisture in the ductwork, especially in humid areas, encourages mould and mildew growth, leading to that damp smell.

  • Mould on the Evaporator Coil
    The evaporator coil can collect dust and moisture, providing a breeding ground for mould that spreads odours with the cool air.

  • Old or Neglected Units
    Older AC systems or those lacking regular maintenance often collect dirt and moisture, making them more likely to smell musty.

A man fixing an ac smelling musty

How to Get Rid of Musty Smells from Your AC

Ac smelling musty, it’s unpleasant but they’re often easy to fix. Here are some simple steps to tackle the problem and keep it from coming back:

  • Replace or Clean Air Filters
    Dirty filters can trap moisture and allow mildew to grow. Replace or clean your AC filters every 1–3 months to improve airflow and reduce odours.

  • Flush the Drain Line
    Clear the drain line with a mix of vinegar and water. Pour the solution in to remove blockages and prevent moisture build-up, which can lead to mould.

  • Check and Clean the Ducts
    If you notice mould in your ducts, you may need a professional cleaning. This helps eliminate odours and improves indoor air quality.

  • Clean the Evaporator Coil
    Use a soft brush to gently clean dust off the evaporator coil. For deeper cleaning, spray a coil cleaner or contact an HVAC technician for help.

  • Control Humidity with a Dehumidifier
    High humidity can make your AC more prone to mould. A dehumidifier helps control moisture levels and keeps your system fresh.

  • Schedule Regular Maintenance
    Professional AC servicing includes cleaning and checking for hidden issues. This prevents odours and keeps your system running smoothly.

Book your AC service appointment now.

Is a Musty Smelling AC Dangerous?

While the smell itself might not be harmful, the underlying cause can pose serious risks to your health and indoor air quality. A musty odour often indicates mould or mildew in the AC system, which can release tiny spores into the air. These spores can significantly impact respiratory health, especially for sensitive individuals.

  • Mould Exposure Risks:
    Studies show that mould spores can trigger allergic reactions in up to 20–30% of people, including symptoms like sneezing, runny nose, and itchy eyes. For individuals with asthma, exposure to mould can worsen symptoms in 40–60% of cases.

  • Air Quality Concerns:
    A mouldy AC system can reduce indoor air quality by up to 30%, making it harder for everyone in the home to breathe comfortably, especially those with pre-existing conditions like COPD or bronchitis.

  • Long-Term Health Effects:
    Prolonged exposure to mould spores may lead to chronic respiratory issues. In severe cases, it could cause hypersensitivity pneumonitis—a condition that affects about 1 in 100,000 people but can result in long-term lung damage if untreated.

How to Keep Your AC Smelling Fresh Naturally

Musty AC smells can be avoided with a few thoughtful steps. Here are some unique tips to help maintain a clean and odor-free air conditioning system:

  • ✔︎ Opt for Washable Filters
    Consider using washable filters that can be cleaned and reused. This not only prevents dust accumulation but also ensures a fresh start every time you clean them.

  • ✔︎ Install an AC Drain Pan Tablet
    Place a drain pan tablet in the condensate pan to prevent algae and mould from forming. These tablets dissolve over time, keeping the pan clean without extra effort.

  • ✔︎ Enhance Ventilation Around Your Unit
    Ensure your AC unit has good airflow by keeping the surrounding area free of obstructions like furniture, boxes, or plants. This helps reduce stagnant moisture.

  • ✔︎ Use Natural Cleaning Solutions
    Clean your evaporator coil and other accessible parts using mild, non-toxic cleaners like a mix of baking soda and water. This reduces chemical exposure while keeping your unit fresh.

  • ✔︎ Upgrade to a Smart Thermostat
    A smart thermostat can help regulate temperature and humidity more precisely, reducing the risk of excess moisture in your system that leads to smells.

  • ✔︎ Add Essential Oil Pads to Your System
    Some systems allow for essential oil-infused pads to be added near the vents. This is a simple way to maintain a light, pleasant scent in your home while running the AC.

Take these small but impactful steps to keep your AC in perfect condition. For expert assistance and system checks, book your AC service appointment now.

If your AC smells musty, don’t ignore it. While it might start as a mild inconvenience, allowing mould and mildew to build up in your system can lead to bigger problems down the road. By identifying the cause, performing routine maintenance, and addressing issues early, you can enjoy fresh, cool air without the unwelcome musty odour.

For professional AC cleaning and maintenance services, or if the smell persists despite your efforts, consider reaching out to US. A little attention now can save you from larger headaches later, ensuring your AC keeps you cool and comfortable – without the musty scent!

Looking for a Quick Fix for your AC smelling musty ?

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Why is Your AC Leaking? Common Causes, Diagnosis, and Solutions

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Why is Your AC Leaking? Common Causes, Diagnosis, and Solutions

Leaking Air Conditioner

Common Causes of AC Leaks

➜ Condensate Drain Line Clogged

Cause: This might be because your condensate drain line becomes clogged from the dirt, dust, and debris after some time and is supposed to remove the excess moisture from your AC. Summed up, this is the water build-up, which later on leaks from the unit.

Diagnosis: If you notice that water is collecting in the region near your AC unit, then this is most likely a sign that the drain line may be clogged. Take a look at the line and ensure it is draining properly.

Solution: Please try to remove the blockage from the drain line using a vacuum or utilize a cleaning solution designed for cleaning air conditioning drain lines. Maintenance regularly helps evade this from taking place.

➜ Damaged or Disconnected Drain Pan

Cause: An air conditioner’s drain pan catches the extra moisture, but if it becomes cracked, rusted, or disconnected, there can be leakage of water.
Diagnosis: Visible cracks or rust spots in the drain pan are a good indication. If it looks worn or torn, chances are it’s the culprit of your leak.
Solution: Replace the drain pan with a new one. Many replacement parts can easily be found, or you can seek professional help if not so sure.

➜ Low refrigerant levels

Cause: When refrigerant levels drop, it causes a reduction in pressure within the AC system, which can result in the coils freezing. As the ice melts, it leads to excess water dripping from the unit.

Diagnosis: Look for signs of frost or ice on the coils. If your AC isn’t cooling effectively, this may also be a symptom of low refrigerant.

Solution: Low refrigerant needs to be handled by a certified technician, as it involves recharging the system safely. Regular servicing can help detect refrigerant issues early.

➜ Dirty Air Filters

Cause: Clogged air filters restrict airflow, leading to reduced cooling capacity and sometimes causing the coils to freeze up. As the ice melts, water can leak out.

Diagnosis: Check the air filter to see if it looks dirty or clogged. If it hasn’t been changed in a while, it may be causing restricted airflow.

Solution: Change or clean your air filter regularly – ideally every 1 to 3 months, depending on usage.

➜ Improper Installation or Tilt

Cause: If an AC unit is not level, water may not drain properly from the condensate pan, resulting in leaks.

Diagnosis: Check to see whether your unit is slanted or not installed level with the ground.

Solution: Adjust the AC unit to ensure it is level. If you’re unsure about the installation, a professional may assist you in making the necessary adjustments for proper drainage.

Condensate Drain Line Clogged
Condensate Drain Line Clogged
Damaged or Disconnected Drain Pan
Damaged or Disconnected Drain Pan
Low refrigerant levels
Low refrigerant levels check
Engineer replacing Dirty Air Filters
Engineer replacing Dirty Air Filters
Refitting AC after Improper Installation or Tilt
Refitting AC after Improper Installation or Tilt

How to Diagnose an AC Leak

  1. Visual Inspection: Start by examining your AC unit for visible signs of water leakage or pooling. This can help you pinpoint if the leak is internal or external.

  2. Check the Air Filter: A quick check on your air filter’s condition can reveal if restricted airflow might be the cause.

  3. Look for Ice on Coils: If you see ice forming on the coils, this could indicate low refrigerant levels or an airflow issue.

  4. Test the Thermostat Settings: Sometimes, incorrect settings can overwork your AC, causing it to freeze up and then leak when the ice melts.

  5. Inspect the Condensate Drain Line: Try flushing the line to see if it’s clogged. A straightforward check can reveal if it’s draining properly.

Solutions and Prevention Tips

  1. Regular Maintenance: Schedule routine maintenance to clean out drain lines, inspect refrigerant levels, and replace air filters. Consistent upkeep helps prevent common leaks.

  2. Clean or Replace Air Filters: A fresh air filter improves airflow, preventing coil freezing. Aim to change your filters every few months or as needed.

  3. Professional Inspection: Have a technician perform an annual inspection. They’ll check the refrigerant levels, condensate drain line, and other components to ensure everything is in working order.

  4. Use a Drain Line Cleaner: Every few months, use a specialised cleaner to flush out the drain line. This can prevent clogs and help avoid leaks.

  5. Check Installation: If your AC was recently installed and is leaking, ensure it’s positioned level with the ground. Poor installation can affect drainage and lead to water leaks.

When to Call a Professional

While some of these solutions are straightforward, certain issues, like low refrigerant or a broken drain pan, require professional intervention. Calling in a certified HVAC technician can save time and ensure the repair is done safely and efficiently.

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Email:
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Be Cool Air Conditioning & Refrigeration London

Call: 0203 488 1889

Address:
Office 7, 35/37 Ludgate Hill
London, EC4M 7JN

Email:
info@becoolrefrigeration.co.uk