If you’ve noticed your air conditioning unit dripping or leaking water, you’re not alone. It’s one of the most common issues homeowners face during the warmer months. While a small amount of condensation is perfectly normal, constant water leaks from your air con can be a sign that something isn’t quite right. As experienced air conditioning installers in Bagshot, we often get called out to diagnose and fix these problems.
In this article, we’ll explore the main reasons why your air con might be leaking water, how serious the problem is, and what you can do about it.
Normal Condensation vs Problem Leaks
Your air conditioning system works by drawing warm air across evaporator coils. These coils cool the air and, in the process, moisture naturally condenses. Normally, this water is channelled safely away through a drain line.
However, when something interferes with this process, water can build up and start dripping where it shouldn’t. That’s when it becomes an issue.
Common Causes of Air Con Water Leaks
1. A Blocked Condensate Drain Line
Over time, dust, dirt, and even mould can clog up the drain line. When this happens, the water has nowhere to go and starts backing up, often leaking out of the unit. This is one of the most frequent causes we see during air con servicing.
Solution: A professional service will flush the drain line, clear the blockage, and ensure the system is draining correctly.
Learn more about our AC Servicing options.
2. Dirty Air Filters
When your air filters become clogged, airflow is restricted. This can cause the evaporator coil to freeze. Once the ice melts, you may notice pools of water under your unit.
Solution: Regularly changing or cleaning your air filters will keep your system running smoothly and prevent leaks.
3. Low Refrigerant Levels
If refrigerant is leaking from your system, the pressure inside drops. This again leads to the evaporator coil freezing, with excess water appearing once it thaws. A refrigerant leak is a more serious problem and should always be handled by a qualified engineer.
Solution: Book a professional air con repair visit to identify and fix the leak, and to safely top up refrigerant.
See our AC Repair service for more information.
4. Improper Installation
If your air conditioning system wasn’t installed correctly, you may experience ongoing issues with water drainage. For example, if the unit isn’t level or the drain pan is poorly fitted, water won’t flow where it should.
Solution: Choosing a reputable installer is key. At Bracknell Plumbing & Heating, we carry out AC installations across Berkshire and the surrounding areas with attention to detail and full manufacturer guidance.
Find out more about our AC Installations.
5. Damaged or Rusted Drain Pan
Older units may develop cracks or rust in the drain pan, meaning water simply escapes instead of draining away.
Solution: A replacement drain pan may be needed, something our engineers can supply and fit quickly.
Should You Worry About Leaking Water?
A little bit of condensation is nothing to panic about, but if your air con is leaking steadily, pooling water, or even causing damp patches on your walls or ceilings, you should get it looked at straight away. Left untreated, leaks can cause:
- Damage to walls, ceilings, or flooring
- Mould growth in the home
- More serious air con breakdowns
That’s why regular maintenance and servicing are so important.
How Bracknell Plumbing & Heating Can Help
We provide a full range of air conditioning services, from routine maintenance to emergency repairs and complete installations. Our expert engineers cover Bracknell, Ascot, Wokingham, Reading, Windsor, and beyond.
Whether you need a quick fix for a leaking unit or are considering a brand new installation, we’re here to help.
Final Thoughts
A leaking air conditioner isn’t something you should ignore. In most cases, the cause is relatively simple, but if left unchecked, it can develop into a more costly problem.
By booking regular AC servicing and ensuring your system is installed and maintained by qualified engineers, you can enjoy reliable cooling without the worry of leaks.
At Bracknell Plumbing & Heating, we’re always happy to offer advice and professional support. If your air con is dripping water, get in touch with us today.
📍 Written by Bracknell Plumbing & Heating – your trusted local heating engineers, plumbers, and air con specialists.