What does the light on the AC mean?

Modern air conditioning systems are sophisticated pieces of electronic equipment. The outdoor unit circuit boards typically have inbuilt technology designed to protect the system, which is why you occasionally notice the green power light flashing on and off. Don’t be concerned – it doesn’t mean your air conditioning unit needs repair or is faulty. Most times it simply means the system needs to be reset.

The electronics in modern air conditioning systems are sensitive. A spike in the power supply can play havoc with them, particularly during electrical storms or other events that might cause fluctuations in the units power supply. When the system detects an overvoltage, it may be triggered into a self-protection shutdown mode, and consequently, the green light will begin flash. This is an automatic response to protect the unit from the increase in voltage. Consider it a preventative alert to avoid damage to the system.

Another consideration, in the case of a multi-split system, is your settings. Where you have a single outdoor unit and multiple indoor units, all the indoor units have to be on the same mode setting. Having one on heating and another one on cooling will lead to imbalances, causing the system to not function and as a result, you may receive a flashing green light.

Other possible causes may have to do with the refrigerant, something stuck in the fan or a damaged power chord. These require a qualified air conditioning technician to check the cause of the fault and repair it safely, so give us a call to schedule a service if the following advice doesn’t clear the light.

Troubleshooting a flashing green light

If the unit has developed a fault, as indicated by the indoor green operation light blinking, you’ll need to switch off the isolator, leaving it off for 20 seconds or more before turning it back on. This will allow the system to reboot and reset, which should resolve the issue.

You should find the electrical isolator switch next to the outdoor unit. These are installed as a safety measure to easily cut power to the system during maintenance, relocations and repairs.

If you’ve tried rebooting the system and the flashing green light persists, give us a call. Be sure to take note of the steps you’ve taken to troubleshoot the issue before calling as any additional information can help us resolve the issue for you.

Is your aircon flashing a green light?

Give PenAir a call. We’ll send out a qualified, experienced technician to investigate the issue for you. If we find a fault, we’ll provide you with a detailed quote, along with an explanation of what may have caused the issue and how we intend on repairing it. Don’t forget, we also offer ongoing maintenance and service programs for all of our clients. By keeping the system running smoothly and efficiently it will prevent sudden, inconvenient breakdowns.

Last Updated on 05/07/2021

If your air conditioning unit light is continually blinking, you need to find out what is causing the light to blink and what to do about it.

Usually, having an air conditioner light blinking means something is wrong with the unit. It typically indicates some error occurring with operation as the sensor is detecting it. Many of the different brands in the marketplace have an indicator that will blink when the unit requires repair.

Contents

• 1. Poor Air Circulation
• 2. AC is Leaking
• 3. Your Filters Are Clogged
• 4. Evaporator Coils Can Freeze
• 5. Poor Maintenance
• Why Do I See The Blinking Light On My Daikin Aircon?
• Why Does My Mitsubishi Airconditioning Unit Blink?
• Final Thoughts

Here are some common reasons for the light blinking and what to do about them.

1. Poor Air Circulation

One of the reasons could be caused by your unit having poor air circulation. If your unit isn’t able to circulate the air as well as it should, you’re likely going to experience issues with the performance of your unit as it can’t push out cold air.

There could be a problem with your unit’s internal drive motor or even the unit being improperly positioned. Look to see what error code is being displayed on your AC unit itself and figure out what the user manual says about it.

2. AC is Leaking

One of the things that you might be experiencing is leaking refrigerant. This is a gas that is essential to the proper functioning of any air conditioner unit. If your unit doesn’t have the right amount of refrigerant, it could lead to condensation building up.

This can be the direct result of your condenser freezing which can result in your air conditioner leaking. Having a lack of refrigerant caused by a leak can end up resulting in your compressor unit getting damaged. Therefore, you might want to see if you notice a hissing sound stemming from your unit.

3. Your Filters Are Clogged

Unfortunately, when your unit’s filters are clogged, it can cause issues. Your filters need to be unclogged for them to work well. That way, your unit has nothing obstructing from blowing strong and clean air.

If your unit hasn’t been cleaned and maintained properly, it could experience dust buildup. This can end up causing your filters to become susceptible to clogging, and it can result in bad odours. The best way to ensure this doesn’t happen is by swapping out filters now and then and by cleaning the filters themselves.

You want to do this to prevent airflow from being blocked in your evaporator coil. Cleaning your filters every three months is recommended for this. Neglecting your evaporator coils could result in freezing, leading to a leak down the road.

4. Evaporator Coils Can Freeze

This is something that you will want to address as soon as you notice it. This is a situation that requires immediate attention because it can lead to a situation where your air conditioner unit begins to leak water.

This situation can occur when you have duct issues. If you are looking to tell whether or not your fan coils are frozen, you’ll want to open up your AC’s front panel. That way, you can tell if there is a layer of ice on top of them.

5. Poor Maintenance

When your AC unit isn’t maintained properly, it will face many issues that can result in a malfunctioning unit. Because of this, you want to be certain that you are spending the time and energy maintaining your unit and keeping it working well. By maintaining your unit regularly, you’ll be able to keep it clean and to work optimally.

You will notice times when your unit has a flashing light that will indicate that your unit requires servicing. If your unit is experiencing blocked air filters, you could try to troubleshoot the issue yourself. You could also contact the AC unit’s manufacturer to ask them for troubleshooting steps that you can take to correct the issue.

Why Do I See The Blinking Light On My Daikin Aircon?

One of the biggest reasons your air conditioner unit might begin to flash is that there is something wrong with it on the outside of the unit itself. It could be something stuck on your unit that keeps your fans from spinning correctly, or it could be something else.

Daikin branded units are relatively smart as they have a function that will self-diagnose to help you identify the underlying cause. While this isn’t accurate 100% of the time, it will give you a good idea of what’s going on with your unit.

Why Does My Mitsubishi Airconditioning Unit Blink?

One of the things that can result in a blinking unit is if the clasp is loose. It will automatically turn on the blinking lights to let you know it’s slightly jarred.

Final Thoughts

You’ll want to call on professionals when you are dealing with AC problems. These problems listed in this article are all reasons to call on a professional. A professional will be able to diagnose the issue and solve it quickly.

If you find yourself dealing with any of these problems, you can call us today. We promise to help you remedy the issue as quickly as possible to get your AC unit functioning optimally for your family’s comfort.

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