Air conditioner

How to troubleshoot common air conditioning problems

From time to time it is possible to experience some problems with your central air conditioning. Although the issues can be varied and sometimes challenging to diagnose, we will try to outline the main culprits and their solutions for you. However, if you prefer playing safe, AFR Dynamics is always at your service with its highly skilled specialists to find immediate answers to your common air conditioning problems. Let’s have a look at what we can do in case of burdening the responsibility by ourselves. This article is going to cover the most common air conditioning problems you might face.

Your Air Conditioner does react at all

If it seems impossible to switch the AC on, look for the problem on the circuit breaker, blown a fuse. It is also possible that you have not set the thermostat correctly.

  •    Make sure that the temperature to which you have placed the thermostat is not higher (lower) than the temperature of the room if you want to make it cool down (warm-up). Because if it is so, the air conditioner gets the signal as if the mission is completed and stops working until the room temperature changes.
  •    Thermostat must be in the cold mood if you want to get it cooled and in heat mood in case you need warming up.
  •    All buttons around your AC must be on, not off and do not forget checking the one for safety which is generally out of the house or on the other side of the wall
  •    Make sure that the condensate overflow tray is not overloaded with water. Once the water exceeds the capacity of tray AC automatically stops working.

•    A left opened or insecurely closed blower door can also lead to common air conditioning problems. Make sure that they are safely shut.

The central air conditioning system is so big that the air is not dehumidified


An inappropriate size of the central air conditioning system can be one of the guilty party. To identify if the system fits your apartment, pay attention to mode signs. If the AC system is too big for your house, OFF modes will keep turning into ON modes and it is most probably because of inappropriate sizing.

  •    The solution to this problem, you can either change the system or make the area bigger by keeping all the doors open. Disregard how important the temperature is in these areas for you, including your garage and basement.

The size is just fine, still no dehumidification

This time your house is to blame. It means that the house is too humid itself or there might be a leak.

  •    Control the taps or pipes for any leaks.
  •    Left open windows in wet days can also cause this kind of problems. So try to keep the windows closed.
  •    It is also possible to utilize additional drainage which works well enough to solve your problem
  •     If you are still experiencing dehumidification problem, it is recommended to contact specialists.

Compressor periods are too long


If you observe your air conditioner to be ON for more extended periods but still not cooling as you desire, it is a sign of a broken air conditioner.

  •    In this case, the wisest action to take is calling a specialist who can check your AC and replace the guilty party.

Compressor periods are too short


The AC is mostly in OFF mode with short ON modes. In this case, the problem can be about the thermostat which can be blocked, coils which can be frozen or the refrigerant which can be leaking. The very big cooling system again can be the reason.

  •    Unblock the thermostat if it is blocked,
  •    Clean the condenser fins if they are dirty,
  •    Change the air filter if it is not clean anymore,
  •    Change the big condenser to a smaller one with the help of a specialist.

The ventilation is not strong enough

Possible dirty air filters intervene in the airflow. It is possible that the filters have built up dirt on them and got clogged. So the dust blocks the air from going out.

  •    You need to make sure that the filters are not overloaded with dirt. If so, get rid of the dirt or replace the filters by new ones.
  •    Scrutinize the ductwork not to be detached or compressed. Look for it in even not commonly used areas such as basement or attic
  •         Make sure the vent dampers are entirely open in all the rooms.

Noisy air conditioner inside

Noises can happen in the interior side of the air handler, the outer part of the compressor or the ductwork. If your central air conditioning is not a model working with direct-drive motors, then the problem may derive from the belt. Air conditioning problems associated with belt driven AC’s is that the strap covering the engine and the blower is not in its place. However, if it is worn or useless, you need to replace them.

If your AC is direct-driven, but you experience this problem most probably, you need to replace the engine bearings. Unless you are good at this type of work, it is always recommended to ask a specialist for help.


Noisy air conditioner outside



When the outer part of your air conditioner gives out a buzzing sound, it means that the air conditioner cannot get on because the run capacitor does not work correctly. It makes the motor heat up and cannot get into the working mode. Gently push the fan to the right to help it to start on. However, it is a temporary solution. The best thing you should do in case of this type of common air conditioning problems is replacing the capacitor.

Air Conditioner does not stop working

One of the conventional common air conditioning problems is that the room is at the desired temperature, but the air conditioner does not turn off.

  •         You should examine the outer part of the air conditioner.
  •         You should check the thermostat or the electrical system to identify the problem. You can shut off the circuit breakers off if you need a temporary but immediate solution.

If the thermostat stops working when you turn the heat button, it means;

  •         the thermostat is worn out and needs a replacement.

If the thermostat is working without any problem,

  •         pay attention to the wires. None of them should be disconnected.
  •         while the air conditioner is operating, pull the yellow cable out. If the AC shuts down the thermostat might be broken, or the wires are not in correct order.
  •          If there is nothing with the cables, replace the thermostat.

It is always better to stop a problem before it appears. By taking your central air conditioning to a professional AC repair service will let you avoid most of the possible air conditioning problems. On the one hand, it is more cost effective, on the other hand, you are less likely to undergo a disappointing central air conditioning problem when you need it to work correctly. In case you invite a specialist at the beginning of a cold/hot season you extend the life of your central air conditioning. The precautions that the specialists will take are listed below:

  •         Cleaning the condenser and coils,
  •         Checking the electrical connections,
  •         Checking or maintaining the ductwork,
  •         Inspecting the sealed refrigeration system of your air conditioner. It is something not to do by amateurs, these steps will help you to Prevent your AC from facing common air conditioning problems