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Air Conditioning Repair – DIY Tips for Repairing Air Conditioners

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The do-it-yourself (DIY) air conditioning repair and maintenance tips shared in this post will be of great help when it’s difficult to get affordable air conditioning repair technician or in a situation where there is need for an emergency air conditioning repair.

If your air conditioner fails, start by checking any fuses or circuit breakers.

You can allow the device to cool down for about five minutes before resetting all the switches.

If your central air conditioner compressor stops working on a hot day, the high-pressure limit switch may have tripped; You can reset it by pressing the button located on the compressor access panel.

The air conditioner’s filters, coils, and fins require regular maintenance to ensure that the device functions efficiently throughout its service life. Neglect of the necessary care leads to a steady decrease in the air conditioner’s performance with a constant increase in energy consumption.



The most critical air conditioning repair and maintenance task that will ensure the efficiency of your air conditioner is the regular replacement or cleaning of its filters.

Clogged and dirty filters block the normal airflow and significantly reduce the efficiency of the system.

If the normal airflow is obstructed, the air passing through the filter can transfer dirt directly into the evaporator coil and reduce the heat absorption capacity of the coil.

Replacing a dirty, clogged filter with a clean one can reduce the energy consumption of your air conditioner.

For central air conditioners, filters are usually located somewhere along the length of the return channel.

Common filter locations are located in walls, ceilings, stoves, or in the air conditioner itself. Room air conditioners have a filter installed in a grid that faces the room.

Some types of filters can be reused; others need to be replaced. They are available in different types and with different efficiencies.

Clean or replace the filter or filters of your air conditioning system every month or two during the cooling season.

Filters may need more frequent maintenance if the air conditioner is constantly used, exposed to dust, or you have furry pets in your house.


Another important tip for air conditioning repair and maintenance is concerned with the evaporator coils and conditioner’s condenser coil.

The evaporator coil and the air conditioner’s condenser coil collect dirt over months and years of service.

A clean filter prevents rapid contamination of the evaporator coil.

However, over time, the evaporator coil will still collect dirt.

This dirt reduces the airflow and insulates the coil, reducing its ability to absorb heat.

To avoid this problem, check the evaporator coil every year and clean it as needed.

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Outdoor condenser coils can also become very dirty if it is dusty outside or there is foliage nearby. You can easily see the condenser coil and notice if dirt accumulates on its edges.

It would be best if you minimize dirt and debris near the condenser.

The air vents of your dryer, falling leaves, and the lawnmower are all potential sources of dirt and debris.

Cleaning the area around the coil, removing any debris, and pruning foliage at a distance of at least 2 feet (0.6 meters) ensures sufficient airflow around the condenser.

  • SPIRAL RIBS (Coil Fins)

The aluminum fins on the coils of the evaporator and condenser are easily bent and can block the flow of air through the coil. Air conditioning wholesalers and some Air conditioning repair technicians sell a “fin comb” tool that will bring these fins to almost their original condition.

In case you cannot do the bent coil repair on your own, you can involve ac heating repair technicians to help you out.


From time to time, run a hardwire through the drainage channels of the device. Clogged drain channels prevent a decrease in the humidity in the machine, and as a result, excess moisture can lead to discoloration of the walls or carpet.


At the beginning of each cooling season, check the seal between the air conditioner and the window frame to make sure that it is in contact with the metal body of the device. Moisture can damage this seal, allowing cool air to escape from your home.


In winter, either cover the air conditioner in the room with a lid or remove it and store it. The coating of the outdoor unit of the central air conditioner will protect the device from winter weather and debris.


If your air conditioner needs more than regular maintenance, it is safer to hire a professional maintenance specialist.

A well-trained air conditioning repair technician will find and fix problems in your air conditioning system without causing more damage.


  1. Check the correct amount of refrigerant.
  2. Check for refrigerant leakage using a leak detector.
  3. Capture any refrigerant that needs to be removed from the system instead of illegally releasing it into the atmosphere.
  4. Check and seal leaks in the channels in the central systems.
  5. Measure the airflow through the evaporator coil
  6. Check the correct electric control sequence and ensure that the heating system and the cooling system cannot work simultaneously.
  7. Check the electrical terminals, clean and tighten the connections, and, if necessary, apply a non-conductive coating.
  8. Oil engines and check the belts for tightness and wear.
  9. Check the accuracy of the thermostat.


This part of this article will help you find out what you should ask about when hiring a technician for your air conditioning repair.

Even though the manufacturers of air conditioners try to produce high-quality and durable products, there is no way man made products won’t require maintenance and repair.

Here, I will try to highlight some common problems with air conditioning systems.

  • Insufficient Maintenance

If you allow contamination of the filters and coils of the air conditioner, the device will not work as it should, and the compressor or fans will most likely fail prematurely.

  • Problems with Sensors

Room air conditioners are equipped with a thermostat sensor located behind the control panel, which measures the temperature of the air entering the evaporation coil. If the sensor is disabled, the air conditioner may constantly work or behave erratically. The sensor should be close to the coil, but is not supposed to be touching it. So, adjust its position by carefully bending the wire that holds it in place.

  • Problems with Drainage

When it is wet outside, check the condensate drain to make sure that it is not clogged and drains properly. Room air conditioners may not merge properly if they are not installed on the same level.

  • Refrigerant leaks

If your air conditioner does not have enough refrigerant, or it was insufficiently charged during installation, or it leaks. If it leaks, simply adding a refrigerant is not the solution to the problem.

A trained technician should fix any leak, check for repairs, and simply charge the system with the needed amount of refrigerant.

Remember that the performance of your air conditioner is highest when the refrigerant consumption exactly meets the manufacturer’s specifications and is neither underestimated nor overestimated. Refrigerant leaks can also harm the environment.

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One of the most common problems with air conditioning systems is inappropriate operation. If your air conditioner is turned on, be sure to close the windows and exterior doors of your home.

For indoor air conditioners, isolate a room or a group of adjacent rooms as much as possible from the rest of your home.

Other problems with air conditioners may occur as a result of improper installation, poor-quality maintenance procedures and improper maintenance.

Incorrect installation of the central air conditioner can lead to leakage of air ducts and low air consumption.

In many cases, the refrigerant consumption (the amount of refrigerant in the system) does not meet the manufacturer’s specifications.

If the refrigerant is not properly refilled during installation, the performance and efficiency of the device are reduced.

 Unskilled air conditioning repair and maintenance specialists often do not find problems with charging the refrigerant or even exacerbate existing problems by adding refrigerant to an already filled system.

So, don’t forget to check them.

I hope you got some valuable DIY air conditioning repair and maintenance tips that can be useful when it’s difficult to get affordable air conditioning repair technician or in a situation where there is need for an emergency air conditioning repair?

Feel free to send me your feedback, comments, or correction for mistakes in the comment below.

You can also contact to feature(mention) your brand or air conditioning repair service on this page or any other relevant content on this website.

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