What is an Air Conditioning Service?

An air conditioner is a very tough piece of equipment. It is engineered to withstand all sorts of abuse and keep on running. This is great in most respects, but it can lead to complacency about maintenance. Like a car, air conditioners need regular services and maintenance to run properly.

Without regular maintenance an air conditioner loses about 5% of its original efficiency for each year of operation. This means that the 14 kw unit that you bought just two years ago may be functioning like a 12 kw unit today! The good news is that you can recover most of that lost efficiency through regular maintenance. Studies show that with regular service a unit will maintain up to 95% of its original efficiency. This means that the cost of an annual service is recovered very quickly in savings on your monthly electric bill and reduced repair costs. A properly serviced air conditioner will also do a better job of heating and cooling your property.

All equipment, even the most reliable, needs routine maintenance. Complicated equipment like today’s air conditioners benefit in many ways from annual service. They recover much of their lost efficiency, they are less likely to suffer a major break down, they have a longer life span, they increase your comfort, and they operate for less money.

One common problem with existing air conditioners is resulting from poor service procedures, and inadequate maintenance. Unqualified service technicians often fail to find refrigerant charging problems or even worsen existing problems by adding refrigerant to a system that is already full. That’s why it is important to have a qualified engineer carry out your service.

Our Maintenance and Service consists of:

Our technician will carry out the following during the maintenance or your Air Conditioning units:

Clean v Dirty Filter

Indoor Section Split System Maintenance

  •  Remove and clean filters on indoor section
  • Clean discharge louver vanes
  • Check condition of fan, motor and scroll
  • Check and test return air thermistor
  • Check condition of evaporator coil.
  • Check electrical and electronic wiring, plugs and termination
  • Check off coil temperature readings
  • Check airflow discharge of indoor
  • Check condensate drain lift pump and pipework

Outdoor Condenser Section Maintenance

  • Check condenser coil for operation
  • Check four way reversing valve for heating and cooling operation cycles.
  • Check condition of compressor and pipework.
  • Check electrical and electrical wiring, plugs and terminations
  • Check off coil discharge temperature

Common Faults found while carrying out a service:

Refrigerant Leaks

If your air conditioner is low on refrigerant, a trained technician should fix any leak, test the repair, and then charge the system with the correct amount of refrigerant. Remember that the performance and efficiency of your air conditioner is greatest when the refrigerant charge exactly matches the manufacturer’s specification, and is neither undercharged nor overcharged. Refrigerant leaks can also be harmful to the environment.

However since the 1 January 2015 according to Environmental Protection Agency the following applies:   Note that although equipment containing R22 can continue to be used beyond 31 December 2014, there can be no maintenance or servicing carried out on the equipment that involves breaking into the refrigerant circuits.” This means that we cannot fix any leak or break into the system in any way without recovering and disposing of the R22.

The EPA have issued guidelines that the end user of an appliance containing refrigerant gas should follow. It is worth noting that the onus is on the end user to ensure the guidelines are being followed correctly. You can find a full document on these guidelines by following this link: EPA – Air conditioning End User Guidelines

Inadequate Maintenance

If you allow filters and air conditioning coils to become dirty, the air conditioner will not work properly, and the compressor or fans are likely to fail prematurely as the unit is overworked when attempting to reach the correct temperature required.

Electric Control Failure

The compressor and fan controls can wear out, especially when the air conditioner turns on and off frequently, as is common when a system is oversized. Because corrosion of wire and terminals is also a problem in many systems, electrical connections and contacts should be checked during a professional service call.

Sensor Problems

Room air conditioners feature a thermostat sensor, located behind the control panel, which measures the temperature of air coming into the evaporator 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.

Drainage Problems

When it’s humid outside, check the condensate drain to make sure it isn’t clogged and is draining properly.


Please contact Aherne Air Conditioning Ltd to discuss your maintenance and service requirements.

Aherne Air Conditioning Ltd
Unit 3b, Clane Business Park
Kilcock Road, Clane
Co Kildare
Phone: +353 1 4428625
Email: info@aac.ie

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