What are the Most Common Problems with Aircon Servicing?

Air conditioning (AC) systems provide us with exceptional comfort during the hot summer months. Yet, they can be prone to problems if not serviced regularly.

In this blog post, we’ll cover the most common problems you might run into during service. Read on for helpful advice about troubleshooting AC issues and keeping your air conditioner running at maximum efficiency.

Common Problems With Aircon Servicing

From unit power-offs to blocked grills and leaking water, discover the most common aircon servicing problems and what you can do to resolve them.

Unit Not Powering On

The unit not powering on is a common aircon servicing issue. This can be caused by faulty connections or internal electronic components that have failed.

It could also be due to a blown fuse, tripped circuit breaker, an incorrect voltage supply, and damaged wiring. In such cases, checking for any loose connections and testing the fuses should be done first to rule out basic power issues.

If the unit still fails to start up despite such checks, it might require a qualified technician’s help in troubleshooting further into its internal components.

Thermostat Issues

A malfunctioning thermostat can be one of the major issues with aircon servicing. Inaccurate temperature readings or no response to changing settings are signs that a thermostat needs to be repaired or replaced. To fix this issue, it is important to check if there’s any dust build-up on the thermostat and if so, clean it properly using an anti-static spray.

Furthermore, a faulty wire connection between the thermostat and other components of the aircon unit may lead to improper functioning. Proper technical knowledge is needed in order to identify such problems and fixing them without professional help can prove hazardous. Therefore, it is advisable to call for professional help when dealing with wiring issues related to a thermostat.

Unit Not Cooling The Room

One of the common aircon servicing issues is when a unit fails to cool the room. This issue is caused by an absence of refrigerant in the system, or poor circulation due to blockages in the air filter, fan and ducts.

In order to rectify this problem, it’s important that you check all components and wiring for any problems including checking refrigerant levels as well as cleaning and replacing filters if necessary. If there are no visible problems with these elements, then more serious repair work may be necessary such as refilling or replacing refrigerant or resetting a breaker.

Regular maintenance of your air conditioning unit can help prevent this type of issue from occurring again so scheduling regular service checks will ensure that your system continues to run efficiently and remain free from potential problems.

Water Leaking From The AC

Water leaking from an aircon unit is a common problem and can indicate several components requiring attention. The most likely culprits have blocked drainage pipes, faulty parts such as motors or pumps and cracks in the unit itself.

If left unchecked, this issue can cause greater problems such as electrical faults or short-circuiting due to water damage. To prevent further issues from arising, it is important to identify the source of the leak quickly and repair or replace any affected pieces.

Issue With The Sensor

One of the most common problems with aircon servicing is a faulty sensor. A malfunctioning sensor can cause an AC to overcook or undercool the environment, leading to a decrease in comfort levels and wasted energy. An aircon technician will be able to test and replace any damaged sensors that may be causing discomfort in your home.

Another issue with sensors occurs when they become dirty or clogged from dust and other allergens, leading to inaccurate temperature readings. Regular cleaning of these parts by a qualified technician is essential in order to ensure the optimal performance of your system.

Finally, if there is insufficient airflow around the unit due to incorrect installation or poor ventilation, this can also create sensor problems which need to be addressed immediately by an experienced aircon repair service provider.

Blocked Grills

Blocked grills are one of the most common issues encountered when it comes to aircon servicing. This occurs when dust, dirt and other debris build up on the unit’s fins and obstructs the airflow, reducing the machine’s efficiency and cooling power. If left untreated, this can lead to more complex problems such as compressor burnout or a complete failure of the system.

It is important that aircon technicians inspect or clean their clients’ units regularly to avoid blocked grills and any potential damage. They should also check for any blockages along with element corrosion to prevent breakdowns during operation periods. Additionally, regular cleaning of filters will help ensure proper airflow within the system resulting in smoother performance over time.

Stops Performing

Stopping operation is one of the most common problems encountered in aircon servicing. This can be caused by failing components or having an inadequate electrical supply.

Faulty compressors, fan motors, capacitors and valves are some of the most frequent culprits which may cause the unit to cease functioning properly. Additionally, insufficient voltage or incorrect wiring could also lead to motor issues or improper cooling due to a lack of power.

Regular maintenance and checks are essential to ensure that all connections are secure and any defective components get replaced on time for optimal performance.

Outside Fan Issue

Outside fan issues occur when the external fan of the air conditioner is out of order. This issue can result in an uneven temperature and cooling within a room, as well as cause strain on the AC system and lead to additional problems. Checking and cleaning your outdoor unit regularly can help prevent outside fan issues from occurring.

An outdoor condenser unit helps to redirect hot air away from the AC system which is why it’s essential that it remains working properly. Common signs of an outside fan malfunction include visible damage to components, noise coming from the condenser unit or having no airflow at all from the indoor registers, all of which are indications that professional repair work may be necessary.

Regular maintenance checks will enable you to spot any potential faults before they worsen, helping prolong service life and reduce costlier repairs down the line. Professional Aircon servicing companies offer extra advice on how best to look after your AC system throughout its lifespan, ensuring maximum efficiency year-round.

Drainage Problem/frozen Coils

One of the common problems with aircon servicing is drainage problems or frozen coils. A blocked drain line can cause water to back up and freeze, resulting in a malfunctioning AC unit. Moreover, if the condensate drain becomes blocked then it could cause water to leak out of the AC unit which can damage parts like ceiling boards and carpets.

Therefore, it is important to ensure that your air conditioning system has been properly serviced before use. One way of checking this is by looking for signs such as ice on any part of the indoor coil or outlet pipe running from the outdoor unit. If these issues are present then an experienced technician should be contacted to inspect and repair any blockages or faulty components causing freezing issues with your air conditioner’s coils.

Troubleshooting Strategies To Resolve Aircon Issues

From cleaning and replacing filters to refilling or replacing refrigerant, here are a few strategies to tackle common aircon servicing issues – read on to find out more!

Clean And Replace Filters

Cleaning and replacing the filters in your aircon unit is an important maintenance task. This helps to remove dirt, dust, allergies, moulds and other particles, extending the life of the unit by trapping all such particles.

Air filter replacement should be done once every 3 months depending on the usage. Care must be taken while cleaning as too much pressure can damage it beyond repair. The filter needs to also be replaced if it has reached its end-of-life cycle or is torn during regular cleaning.

With clean filters, air quality gets improved instantly which in turn boosts energy efficiency and improves unit performance as well as ensuring a healthy breathing environment for those in the space or house.

Check Piping And Connections

Part of troubleshooting aircon issues is to check for any problems with the piping and connections. Loose, cracked or corroded pipes may be the cause of malfunctioning units. It is important to inspect them carefully and replace them if needed. This would ensure that your unit functions properly and runs smoothly.

Aside from checking for any physical damage, it is also important to keep an eye on refrigerant levels. Refrigerants transport heat away from indoor air handlers, so they should be at their correct pressure levels in order for the system to operate efficiently and cool down your room effectively. If there are leaks in the lines, this could lead to further complications such as poor cooling performance or even freezing up of coils which will then require immediate attention by a professional technician.

Check Refrigerant Level

Refrigerant is essential for the unit’s cooling process. This means that if there isn’t an adequate level of refrigerant, then it won’t be able to cool the room properly and could lead to a malfunctioning unit.

To check the refrigerant level, technicians measure the pressure in all lines while they’re running on different settings, ensuring they reach their optimal levels.

Test Components And Wiring

One of the most common issues with Aircon servicing is faulty components or wiring. To identify these problems, technicians must carry out a thorough check on all electrical components and connecting wires. This entails inspecting the motor, capacitors, relays, and wiring harnesses and checking for continuity issues between the various parts.

Testing individual components with a multimeter can determine if they have any loose connections or shorts in their circuits that could be causing disruption. If needed, experienced technicians can also replace damaged parts to restore the proper functioning of the air-conditioning unit. It’s important to ensure that new wiring complies with safety guidelines so as not to introduce fire hazards in your home environment.

Clean And Replace Air Filter

Cleaning and replacing air filters is one of the most common tasks performed during aircon servicing. Air filters capture dust, dirt and other particles that can reduce the efficiency of your AC system. Therefore, it’s important to replace them regularly to keep the unit running optimally. Additionally, if any debris has accumulated in the filter, this should be removed during cleaning so as not to clog up other components such as condenser coils.

The condition of air filters also plays a role in ensuring healthy indoor air quality by trapping allergens like pollen and pet dander from entering your property. This can help improve overall health outcomes for those suffering from allergies or asthma symptoms due to airborne irritants. As such, it is important for homeowners to pay attention to their filter maintenance schedule for optimal performance in both energy efficiency and improved indoor air quality.

Test And Reset The Breaker

Testing and resetting the air conditioner’s breaker is a useful way to diagnose and fix any AC issue. An overloaded tripped or faulty circuit can prevent your air conditioner from working properly. If you check the breaker box and see that the power switch of the AC has been switched off, then try switching it back on again – this may resolve any problems you’re experiencing with your unit.

If this doesn’t solve the problem, there might be an issue with an overloaded electrical circuit which needs to be addressed by a qualified electrician. Check for any flickering lights in your home as these are signs of a faulty circuit board in need of repair or replacement before using the AC again. Taking steps such as testing and resetting breakers is key when troubleshooting issues with air conditioning units.

Clean The Condenser Coil

Cleaning the condenser coil of your aircon unit is an important part of servicing, as it removes any dirt and debris that can build up over time. This will ensure efficient operation by increasing airflow and improving heat transfer.

To clean the coil properly, use a soft brush to remove dust or dirt buildup on both sides of the coils. If you notice mould growth, use a mild detergent in warm water to scrub away any grime and wipe down with a dry cloth afterwards. When cleaning is complete, inspect for signs of damage like dents or corrosion. Take care when handling sharp edges and make sure all connections are securely fastened after cleaning is done.

Clear The Drain Lines

Drain lines are connections between the indoor unit and outdoor unit that facilitate drainage of condensate collected from air conditioning systems. It is important to keep these drain lines clear for proper functioning as blocked drain lines can create a lot of damage due to water build-up.

To aid in clearing out blockages, it is best to periodically flush the lines with a detergent solution or purge them with compressed air.

Refill Or Replace Refrigerant

Refilling or replacing refrigerant is important to maintain the performance of an air conditioning system. Refrigerant works as a coolant, so maintaining the right level can ensure that your unit runs effectively and efficiently. Low levels can cause your air conditioner to run hotter than it should, leading to frequent breakdowns.

If you notice any signs indicating that the refrigerant needs topping up such as warm air coming from outlets or hissing noises during operation, then this could be an indication that there are low levels of refrigerant in your AC system. A qualified technician should be able to refill or replace the refrigerant as required depending on the age and make of your unit.


In conclusion, aircon servicing is necessary to protect your equipment and improve the air quality in your home. Common problems with aircon servicing include not powering on, thermostat issues, unit not cooling the room and more.

To troubleshoot these issues it’s important to clean or replace filters regularly, check refrigerant levels and wiring, clear out drain lines and replace any faulty components that are causing the problem. If you follow these steps your AC will be running efficiently in no time!

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