11 Most Common Air Conditioner Problems and Their Solutions!

5/5 - (2 votes)

Air conditioners are an essential appliance. But, your AC might show up some problems sometimes. There is nothing to worry. Here, in this post I’m going to discuss about some of the most common air conditioner problems and their solutions.

Common Air Conditioner Problems and Their Solutions

Therefore, without further delay, please give it a reading and understand the problem and its cause.

It is very vital to know the reason behind the issue in order to solve them.

The AC Not Turning On

You might experience turning on the system. However, the system remains as it is. It could be due to a blown-fuse or a tripped circuit breaker. 

To fix it, just rest the circuit breaker or replace the blown-out fuse.

Moreover, loose or broken wiring can also result in this issue. Also, it can be an issue with the thermostat.

Air Conditioner Not Cooling

This is one of the most common air conditioner problems. Here is how you can fix it and the cause behind the issue.

  • An improper AC unit placement might affect the cooling procedure. Therefore make sure that your indoor unit is not undersized.

    Moreover, the outdoor unit must be clean as well. It must be away from direct sunlight or high temperatures.

  • Furthermore, your cooling might get affected by a dirty air filter. Therefore, clean it on a regular basis.

    Moreover, if required, you can replace it.

  • You must maintain your AC regularly. Irregular maintenance results in not cooling. It is important to call a professional to check-up properly once a year.

  • It can also be due to some faulty components inside. It might make your AC inefficient.

    Also, make sure you buy AC from a reputed brand that offers a good warranty.

The Problem of Low Refrigerant

The air conditioner running on low refrigerant fluid fails to blow out cool air and therefore it cannot cool the room.

It is best to find out the leakage signs in order to fix it. These are the signs that indicate a low refrigerant level.

  • If you find ice on refrigerant lines, then it is a sign.
  • If you get a hissing noise.
  • When the evaporator coil freezes.
  • When the vents are not blowing the cool air.

Once you get the leakage signs, contact a technician immediately.

However, note that in such a case, do not add more refrigerant fluid as it will again escape.

Some Strange Noises From AC

Often you experience strange noises from your AC. here are some of them with their reason behind it.

Strange Noises The Reason
A buzzing sound Motor issues, loose parts, bad blower, refrigerant leakage, unclean AC coils
Screaming Refrigerant leakage, pressure in the AC compressor
Clicking Some issues in the thermostat
Clanking sound Loose parts
Banging Broken or some loose parts. Also, it indicates AC compressor replacements.
Rattling Loose fan, clogging of duct, indicates deterioration.
Squealing Issues with belts and motors( indoor & outdoor)

If you experience any of these sounds, do call an electrician and go for a thorough check-up.

Thermostat Glitches

A thermostat detects the surrounding temperature and thereby sets the desired temperature accordingly.

However, if there is a thermostat malfunction, the HVAC system operates poorly. 

Thus, you experience strange cooling.Therefore, check the following things to solve the issue.

  • Check the thermostat settings twice.
  • Check that the wiring is on point or not.
  • Also, check whether the thermostat batteries need replacement or not.
  • Moreover, a software bug can even affect the thermostat. Therefore, contact the manufacturer in such a case.

Frozen Air Conditioner Coil

An air conditioner coil plays an important role when it comes to heat exchange. Thus, any issue in this section is a serious issue. 

Frozen AC Coil

The reason behind this frozen AC coil is refrigerant leakage, broken fans, dirty air filters, clogged condensate lines, and thermostat issues.

However, to resolve the issue, first turn off the AC. It will actually save other units from severe damages.

Leave it for some hours so that the ice melts. You can even use a hairdryer to melt the ice faster.

Note that you must not cut the ice but melt it. Cutting it might end up damaging the AC coils.

However, if the issue persists, call a technician.

Air Conditioner Fan Not Working

If you are experiencing this issue, call for technician help. The reason behind this issue might be a broken circuit inside, or maybe the fan motor is burned.

Furthermore, it can also be an ice build-up in the AC coils.

Bad Odor

This might be due to mold or mildew growth inside the system as the AC is not clean.

You can also experience foul odors if the electrical parts inside get overheated.

However, to solve this issue, you can clean the evaporator coil, condenser line and change the filter.

Also, stop running your AC for longer hours.

The AC Condenser Not Working

AC Condenser Not Working

Here are the signs that indicate that the AC condenser is not working.

  • There will be an uneven room temperature.
  • The unit is ON; however, it does not cool the room.
  • The condenser is shut down completely.
  • Receive higher energy bills.

This malfunctioning of the AC condenser might be a result of the following.

  • Wiring issues
  • Unclean condenser and evaporator
  • Thermostat issues
  • Faulty motor and compressor
  • Insufficient refrigerator

Finally, to fix this, you can repair it. However, if you find the repair is too costly, it is better to replace it with that money.

Water Leakage From AC

Often you find your system is leaking water outside when it is running. It can be due to the unit getting frozen, and later on, it leaks water.

However, you can find other reasons as well. For example, 

  • Blocked drain pipe
  • Low coolant levels
  • Dirty air filter
  • Broken condensate pan
  • An improper installation

To fix this water leakage, first, find out the reason behind it and then act accordingly.

Drainage Problem

The drainage problem is the most common problems in air conditioner. Most of the people have faced this problem at least once who have AC.

The moisture inside the air conditioner is removed through a drain line and then funneled into a drain.

However, if this drain is clogged, the tray overflows. As a result, the water backs up and overflows.

It also damages your system.

Therefore, to fix it, check whether the drain is clogged (due to dirt, lint, and other such) or not.

Final Words

Thus, to sum up, these are some of the most common air conditioner problems that you face.

We have tried to guide you with possible fixes. 

However, no matter whether you experience these problems or not, it is better to call a technician and go for a proper check-up once a year.

It will lighten your burden later on.

If you still have any other queries, do let us know in the comment section.


Nano Silver Filter in Air Conditioners and Air Purifiers – Explained!

How To Clean AC The Right Way? | Explained!


Leave a Comment