Imagine getting plagued with air conditioner problems during a hot summer! Nothing could be worse more than this.
Encountering problems with AC can result from various reasons.
One needs to be aware of the common issues with AC and should know how to troubleshoot them.
In this ultimate guide to AC troubleshooting, we shall discuss the common AC problems and the best ways to fix them.
Let us dive into the discussion right away.
Table of Contents
What Are The Common AC Problems And Their Solutions?
Below is a list of the common AC issues that most people face. Let us also look at the possible solutions to deal with them.
Problem 1: AC Refrigerant Leak
We all know that the refrigerant is a crucial component of the AC that helps in cooling. Refrigerant gas leaking is one of the most common issues we tend to face with an air conditioner. This problem can lead to reduced efficiency of the air conditioning system. Apart from this, continuous gas leakage can be harmful to the environment.
Below are a few consequences that a refrigerant leak can result in:
- Reduced efficiency of the AC unit
- High electricity consumption
- Freezing of the coil
- Damage to the compressor
- Uneven cooling in the room
Let us have a look at the possible reasons contributing to the refrigerant leakage inside the AC unit.
Reason 1: Improper installation of AC
An improper installation of AC can result in a refrigerant leak. Incorrect fitting of some parts and components during installation may cause the coolant to escape.
Solution:
The possible solution to counter this problem is not just adding or refilling the refrigerant. You need to fix this by seeking the assistance of a professional who will inspect, test, and repair the system and then add the required amount to gas.
Reason 2: Damaged Refrigerant Pipes
Refrigerant pipes are responsible for circulating the gas to the condenser and from the evaporator and vice versa. Any damage or defect in the coolant pipes can result in leakage.
Solution:
You can fix this by seeking the assistance of a professional who will inspect the damage and later repair the refrigerant pipes.
You may say how to detect the leaks. Well, here are some of the ways that will help you diagnose the gas leakage problem.
- Registers or Vents not blowing cool air.
- Frozen evaporator coils.
- A spike in the electricity bills.
- Hissing, humming, whistling, and screaming noises coming from the refrigerant lines.
- Loss of cooling power.
If you notice any of the above instances in your air conditioning unit, you can consider it a clear indication of refrigerant leaks. Also, ensure that the coolant in the AC is not undercharged or overcharged.
Problem 2: Frozen Evaporator Coils
Another problem with the AC units is the frozen evaporator coils. This will result in your AC unit not cooling properly. This is the most common problem that many AC owners complain of. Let us take a look at the possible reasons behind this:
Reason: Dirt or Debris Accumulation on the Coils
The primary reason contributing to frost on the evaporator coils is the build-up of dirt or debris on them. When the dirt accumulates on the coils, it restricts the airflow and does not allow the warm air to reach the refrigerant. As a result, the refrigerant gas becomes too cold, causing the moisture on the coils to freeze.
Gradually, as the coils get covered with ice, they prevent the coolant gas in the coils from absorbing the heat. Consequently, it disrupts the performance of the AC.
Let us learn how to fix this issue:
Solution:
To fix this problem, you need to diagnose it in the first place. Inspect the fault or damage on the coils.
After inspecting, allow the evaporator coil to defrost. To let it happen, you need to stop using the unit. Follow the below steps:
Turn off the AC device and disconnect the power supply to it.
It takes about 24 hours for the evaporator coil to defrost completely.
If you want to hasten this process, you can take the help of a hairdryer. However, ensure that you are not overheating the coil.
If there is moderate frost on the coils, you can try this. Just turn off the AC but let the fan on your thermostat turn on auto mode. This will help in melting the ice on the coils.
Now, check for the dirt on the air filters and the evaporator coils, and clean it.
Also, check if there are any blocks or obstructions in the registers and ductwork.
Despite all these measures, if you still notice freezing on your AC, it means your refrigerant gas is low or leaking. It could also be that there is damage to the refrigerant pipes.
Let us look at the other reasons that trigger the freezing on evaporator coils:
- The refrigerant gas is low
- When the outside temperature is very low—this usually happens overnight
- Damaged parts
Problem 3: Air Conditioner Making Noises
Sometimes, you may hear strange noises from your air conditioning unit. Depending on the problem, the device makes different sounds. Let us have a look at the possible reasons contributing to the peculiar noises from the AC unit.
Reason 1: Refrigerant leakage
Type of Sound: Hissing Sound
Whenever there is a coolant gas leakage, your AC starts making a hissing sound.
Solution:
You can fix this by seeking the assistance of a professional. He will inspect the leakage and the underlying cause and sort the issue.
Reason 2: Faulty motor
Type of Sound: Screeching Sound
Whenever you notice a screeching sound from the AC motor, it is a clear indication that there is an issue with the blower motor. Either there should be a problem with the motor bearing or a damaged belt that is about to break.
Solution:
You can try adding some lubricant to the port. This will help in reducing the noise from the motor. If the noise persists, call a technician immediately to identify the actual issue and fix it.
Reason 3: Faulty Blower or Motor
Type of Sound: Rattling or Banging Sound
Do you hear noises like rattling, banging, or thumping sounds from your AC? It could possibly be because of a faulty blower or motor.
Solution
In such a case, turn off the unit immediately and call for a professional to come and fix this.
Reason 4: Faulty Blower Blades
Type of Sound: Smacking Sound
If you ever notice a smacking sound when the blower is running, there is something wrong with the blower blades. Higher chances are that there is an accumulation of dirt and debris on the blades, that is making the noise.
Solution:
Turn off your AC first and check for the debris build-up on the blowers. Clean the dirt carefully, if any.
Reason 5: Loose Hardware
Type of Sound: Rattling Sound
Did you ever notice a rattling sound when the fan turns on the compressor? It indicates that there is something wrong with the motor or there must be loose hardware.
Solution:
Call for an expert technician to look into the issue.
Reason 6: AC Belt
Type of Sound: Squeaking Sound
Whenever there is a problem with your AC belt, you will hear the squeaking sound.
Solution:
Call for an expert technician to look into the issue.
Reason 7: Capacitor Issue
Type of Sound: Clicking Sound
Whenever you turn on or off the AC, you will hear a clicking sound. This is the result of a capacitor failure.
Solution:
You cannot repair or replace the capacitor on your own. It is advisable to call for an expert technician to look into the issue.
Reason 8: Faulty Motor Bearings
Type of Sound: Grinding Sound
Whenever there is a problem with your motor bearing, you will hear the grinding sound.
Solution:
Call for an expert technician to look into the issue and fix it.
Note: You should never ignore the sounds from your air conditioning unit. Irrespective of the noise, seek the help of an expert immediately to find the underlying issue and fix it.
Problem 4: Bad Odour From The AC
The stinking smell from the air conditioners is yet another common problem that most people encounter. There are many reasons contributing to this. Let us have a look at what they are and the type of odour you may likely observe:
Reason 1: Mould Growth
Type of Odour: Pungent Smell
If you ever observe a pungent smell from your AC unit, it is mostly because of the mould growth inside. The possible triggers for this are improper drainage and a clogged air filter. Whenever the drainage gets blocked, it will result in bacteria build-up. This will further lead to a foul smell from the device. The odour can be so strong that turning your AC on will leave your entire house stinking.
Solution:
It is advisable to clean the air filters regularly and ensure that the drain lines are clear. You are sure to notice a change in the odour every time you do this.
Reason 2: Clogged Air Filters
Type of Odour: Burning Smell
If you ever observe a burning or fire-like smell coming from the AC, it means some electrical components are burning. Also, it could be because of the clogged air filters that are causing your air conditioning system to overheat. As a result, you will get a burning smell.
Solution:
The moment you feel the burning smell from your AC, switch off the unit immediately. Inspect if there are any clogged air filters and clean them. If they are beyond cleaning, replace them at the earliest. Call the expert technician to inspect other causes for electric odours.
Problem 5: The AC Turns On And Off Repeatedly
Is your AC turning on and off constantly the moment you switched it on? You can call this problem short cycling. Usually, in this problem, the AC does not complete the full cooling cycle that it should. Instead, it starts over and over again. This is a very serious issue, and any negligence can result in a damaged compressor. Let us take a look at the possible reasons behind this:
Reason: Blocked or Dirty Condenser or Evaporator
If your AC has a short cycle problem, it could be because either the condenser or evaporator is dirty or clogged.
Solution:
The best solution to this is to check for the debris or obstructions in the condenser and evaporator. Clean the debris on them. Further, you can even call a professional to come and inspect for other relevant issues.
Problem 6: Water Leaking From Indoor Unit
We may observe the water leakages from the indoor unit. If this is the case, you should note that the maintenance of the device is overdue. Let us learn about the reasons for this:
Reason 1: Clogged Condensate Pipe
The main reason behind the water leakage from the indoor unit is the clogged condensate drain. This mostly happens because of the algae or fungi growth inside. It further causes the water from the pipes to go back and into your home.
Solution:
The only solution to this is to clear the clogged condensate pipe with the help of a vacuum. To kill the growth of algae or fungi in the pipe, pour about six ounces of vinegar into the pipe. This would do the needful. It is advisable to refer to the user manual to locate the drain pipe.
Reason 2: Broken Condensate Pump
A broken condensate pump is yet another reason for the water leakage from the indoor unit.
Solution:
Check for the condition of the pump and replace it immediately if it is broken or damaged completely.
Problem 7: Water Leaking From Outdoor Unit
Noticing water from the compressor of your AC unit is normal. However, if it is so severe that you no longer see puddles of water outside but continuous dripping, then there is a serious issue to resolve.
Let us have a look at the possible reasons contributing to the water leakage outside the AC unit.
- Dirty or clogged air filters
- Improper installation of the AC unit
- Blocked drain pipe
- Low refrigerant levels
- Broken condensate pan
Solution:
Let us see how to fix this issue. The moment you diagnose the water leakage concern outside the AC, switch off the device immediately and disconnect the power supply to it. Call a professional and seek his assistance. He will inspect the leakage and the underlying cause and sort out the issue.
Note: Such kinds of problems need immediate and timely action. Do not neglect it at any cost.
Problem 8: Damaged Compressor
We all know that a compressor is the heart of the air conditioning unit. It allows the refrigerant gas to carry out the heat exchange and helps in regulating the pressure. Any damage to the compressor will affect the functioning of the device.
Let us have a look at the possible reasons contributing to this problem.
Reason 1: Dirty Coils
One of the reasons for a damaged compressor is the dirty coils. When dirt and debris get accumulated on the coils, it will lead to compressor failure.
Solution:
The possible solution to this problem is to call the professional. He will look into this issue and fix it at the earliest.
Reason 2: Changes In The Refrigerant Levels
Any changes in the refrigerant gas levels will lead to compressor failure. A lower coolant level can make the compressor too cold. Ultimately, it stops working. Similarly, when the refrigerant gas levels are high, it increases the pressure in the unit. Consequently, your compressor fails.
Solution:
You need to fix this by seeking the assistance of a professional who will inspect, test, and repair the system and then add the required amount to gas.
Reason 3: Weak Airflow
If you are noticing a weak airflow or your AC is not cooling properly as it should, it means there is a serious problem with the compressor.
Solution:
You need to fix