Category: Advice

What Do AC Filters Do?

What Do Those Air Conditioner Filters Do?

The job of the filter is to remove particles from the air stream to both keep the air conditioning system clean and to remove particles from the air.


Almost every air conditioning system has a filter upstream of the evaporator coil. This can be in the return grille or in special slots in the duct system and can be a fuzzy-looking or a folded paper filter.

As the filter does its job, it gets loaded with more and more particles. This is actually a good thing and makes the system more efficient, but it also increases resistance and reducing airflow. When this happens, it is time to change the filter. How long it will take to happen depends on how dirty the air is and how big the filter is.


If you don’t change the filter, air flow will decrease and the system won’t perform as well. Not only that, but if the filter is too dirty, it starts to become a source or air pollution itself.

If you take the filter out completely, you would solve the low air flow problem, but this victory would be short lived. The particles that the filter would have taken out will now build up on your evaporator coil and eventually cause it to fail. Replacing it with a new filter is a much cheaper option.

5 Common Air Conditioner Issues in Winter

Autumn leaves are now appearing and winter is quickly approaching.

Homes, offices and retail spaces all benefit from air conditioning all year round and research has proven that productivity improves with quality air conditioned spaces. Workers perform better and customers feel better as we all like to be cool in the summer and warm in the winter.

If the worst should happen and you need assistance with your AC unit, RCL are available and offer a comprehensive 24 hour call out service. We come out and instruct our clients how to use your system and ensure the air-conditioning is balanced and working at optimal output.

Some common issues for you to look out for and hopefully prevent throughout the winter include:


Always keep your units free from obstruction to ensure your system doesn’t have to work any harder than necessary. This is important for both outdoor and indoor units.

Make sure nothing is blocking the indoor vents or air discharge points to enable your systems to run as efficiently as possible.


Set your thermostat controls to a reasonable level (even when you first turn on your system!). 23ºC is a reasonable temperature for homes and offices. A temperature of 30ºC for example is excessive and strains units unnecessarily.

When temperatures are cold, it’s important to position the louvers on the indoor units vertically (or as vertically as is possible) to force the heat down into the room and achieve maximum efficiency from your unit.

If a fault code does appear, the common solution of switching it off and back on is often the answer. Be sure to leave the system off for 10 seconds before restarting. The manual reset is the first thing any engineer will try when called out so save yourself some money by trying it yourself first.


When running in heating mode, air conditioning units stop producing heat from time to time. This allows the system to enter defrost mode, which is necessary to prevent ice and frost building up in the condenser coil. If you are not sure what is happening, wait to see if they start producing heat again before calling someone out.


Room air conditioner units feature a thermostat sensor. It’s located behind the control panel and measures the temperature of air coming into the evaporative coil. If the sensor is knocked out of position, the air conditioner could cycle constantly or behave erratically. The sensor should be near the coil but not touching it; adjust its position by carefully bending the wire that holds it in place.


If you’re using your air conditioning unit a lot during the winter months you’ll tend to find your filter gets a lot dirtier. This build up of dirt can cause a restriction in the air flow causing a knock on effect that makes the furnace have to work twice as hclean_and_dirty_ac_filter_magnificent_airard to maintain the right temperature. Simply check your filters at the very least once a month and replace them when necessary.




People often see water leaking from their outdoor condensers and assume that something is wrong. However, often when the condensers are surrounded by melting snow and ice, it’s completely normal for that to happen when in heating

CAUTION: Is there a public walkway or footpath beneath the condensers? The leaking water can turn into a slipping hazard if it freezes. Divert the water and allow it to drain into a safe area.

If you’re ever in need of professional assistance, please Contact us.


Top Tips on Heat Pumps: Winter Is Coming

Winter will be upon us fairly soon so it’s time to start thinking about keeping our homes nice and warm. For many people, their heating costs seem to rise every year. Most homes in the UK have gas central heating, but some use electricity, oil, or another type of fuel. What a lot of homeowners don’t consider is installing a different type of heating system. Although there is an initial cost, the resulting savings and possible efficiency levels are worth it. Heat pumps are an excellent alternative energy source to consider. They can be used to heat your home and the water you use. There are some excellent reasons you should consider them for your home this winter.

1. They’re Eco-friendly

One of the best reasons to get a pump for your home is that they are good for the environment. Heat pumps work by taking heat from the air or ground, which is then transferred to your home. The heat could be used to warm water, which would circulate around your heating system. It can also warm air, which can then heat your home through fans.dimplex-domestic-air-source-heat-pump Heat pumps also allow owners to benefit from the Government’s Renewable Heat Incentive (RHI). If your heat pump meets the requirements of the programme, you could receive a special tariff.


2. Heat Pumps Can Save You Money

As well as receiving money from the RHI, getting a heat pump could save you money. The systems can help to reduce your energy bills, although there are some things to consider. Buildings that currently run on a fuel such as oil or coal will see the benefit of a heat pump more quickly. If your home or business uses gas or electricity, it could take longer to see the financial benefit of installing a pump. It’s important to weigh up the cost of installation and lifetime use to see if you’ll be saving money. It’s also important to consider the condition of your home. Heat pumps work best when the property is well-insulated.

3. Choose Options

There are options to choose from if you are considering a heat pump for your home. Ground source heat pumps, and air source heat pumps are two primary types. Then there is the choice between air-to-water or air-to-air systems. Some pumps can also be used to cool the home, so they provide a double benefit when summer arrives. There are excellent additional benefits to some pumps. They might have an inbuilt air purifier or the ability to heat a swimming pool, for example. Choosing the best one depends on the building and your lifestyle.

4. Reduced Maintenance

Another benefit of a heat pump is that they don’t require a lot of maintenance. There are several types of heating system that might need regular fuel deliveries or repairs. Heat pumps can run on their own without much care from the owner. Once they’re installed, they can run on their own.

A heat pump is an excellent option for anyone considering a new heating system. Learn more and give yourself another option to consider.

To find out more, Contact us here at RCL.

Heat Wave – Why Is My AC Leaking?

The British summer has finally arrived, and while it could disappear as soon as it came, things are really hotting up around here.

We’re predicted 32C today, which is going to really put your cooling systems to the test!

Over the last week we’ve had an increased number of service calls, relating to air conditioning systems which are leaking water into the client’s premises.
On the cooling side of the AC system, the evaporator coil gets very cold. The idea is that warm air is passed through the evaporator coil, thus cooling the air down..which is then blown into the area you’re working in. This process creates moisture (much like the inside of your freezer).

The moisture that is created then has to go somewhere, usually outside of the building via a gravity or pumped drainage system.

The amount of moisture created can be exasperated by a number of things:

-) The refrigerant pressure in the evaporator is too low, causing it to get colder than designed and icing up
-) The air flow across the evaporator is restricted, for example because of a dirty filter or failed fan
-) High levels of ambient humidity

Anyway, this moisture has to go somewhere!

In summary, the water leaking from your ceiling area right now could be as a result of a number of different issues related to your air conditioning unit. Examples of these issues are

-) Blocked filters
-) Blocked coils
-) Blocked drainage system

There’s a pattern emerging! Water generally does as it’s told, and runs downhill (or if pumped, uphill). Problems occur when something gets in the way and the water starts to overflow!

RCL Air Conditioning operate nationwide with a team of highly trained service engineers. If you’re experiencing AC issues during this current heat wave, please feel free to contact us and we’ll help to find a solution.

Tips On Air Conditioner Maintenance From Industry Experts

Regular air conditioning maintenance is vital to keep your system going. Not only that, but it will keep you and your family healthier, and save a significant sum of money. So, if you want to keep your air con system efficient and working well, read on to find out more. These expert tips will give you all you need to know.

1. Change the Filter:

Changing the filter on your air conditioning unit is a pretty simple task. It’s also a vital part of a good maintenance plan. Dirt and grime can build up fast, which reduces the flow of air and slows down your unit. It also makes the system work harder, with worse results causing your air quality to decrease. Make sure you check your manufacturer’s guidelines before starting and maintenance. It will tell you how long a period you should leave it before changing the filter. You should also make manual checks on the cleanliness of your filter every month or so.

2. Clean the Vents:

You should also clean your vents if you want to improve the efficiency of your A/C unit. Again, vents attract dust and dirt, and they can end up harbouring allergens and bacteria. Long duster

Use a long duster to access any hard-to-reach parts. Make sure they are clear of any dust and wash the covers with a small sponge to ensure you remove everything.

3. Check To See If You’re Blocking The Condensing Unit:

Are you blocking your condensing unit and vents? It’s a common issue in many homes as neither are the most attractive things in the world. However, if you block up your system you only end up spending more money on energy costs, as it will need to work harder. Condensing units often pick up dirt, lawn clippings, twigs and lots of other debris. Once you clear it all out, you should also give it a hose down from the outside.

4. Shut Off The Power

Don’t forget to turn off the power before doing any work on your air conditioning unit. Electric shocks are all too common. And, there is an opportunity for you to hurt your hand with moving parts, too. It is always better to be safe than sorry. It may seem obvious but you should never work on anything electrical without turning off the power first.

5. Clean & Straighten The Fins

Finally, you will need to clean and straighten the fins. Air conditioning fins can be fragile, so take great care while you are working on this important aspect. Use a soft brush to do the job, so that you don’t crush or damage them. If they are bent, they can be straightened out. But, again, you need to be careful. Your owner’s manual should give you some hints and tips on how to deal with your AC unit’s fins, so make sure you read up before attempting any work.

We hope you find this brief guide useful. Get in touch if you have any problems with your air con systems!