5 Common Air Conditioner Repairs That You Can DIY


Air conditioning systems are essential for maintaining a comfortable indoor environment during hot weather. However, these systems can break down over time due to various reasons such as leaks, faulty thermostats, clogged filters, and more. As a result, homeowners may need to hire professional AC repair services to fix their units. But did you know that some of these issues can be fixed on your own? In this article, we’ll discuss five common air conditioner repairs that you can try yourself before calling in a professional. Let’s get started!

Understanding common air conditioner repairs

When it comes to air conditioning units, there are several common repairs that homeowners can tackle themselves without calling in a professional. In this section, we’ll explore some of these common repairs and provide tips on how to fix them. Let’s get started!

1. Refrigerant leak repair

If you notice that your air conditioner is not cooling as well as it used to, there may be a refrigerant leak. A refrigerant leak can cause your AC to stop working completely if left untreated. To repair this issue, you’ll need to find and fix the leak. This process typically involves using a special tool called a leak detector to locate the source of the leak. Once you’ve found the leak, you’ll need to repair it with a specialized sealant. It’s important to note that repairing a refrigerant leak should only be done by a professional HVAC technician, as improper repair can lead to further damage. By addressing this issue early on, you can prevent costly repairs down the line and ensure that your AC is functioning properly again.

2. Condensate pump failure repair

A condensate pump failure can cause water to accumulate inside your air conditioner, leading to mold growth and serious damage to your unit over time. Here are some steps you can take to troubleshoot and fix a failing condensate pump:

  1. Check the drain line: The first step in diagnosing a condensate pump failure is to check the drain line. Make sure it is clear of debris and not kinked. If there is any blockage, use a plumber’s snake to remove the obstruction.
  2. Test the pump: Once the drain line is clear, test the pump by turning on the air conditioner. If the pump fails to start, it may need to be replaced.
  3. Clean the coil: A clogged condenser coil can cause a condensate pump to fail. Use a soft brush to clean off any dirt or debris that may have accumulated on the coils.
  4.  Replace the pump: If none of these solutions work, it may be necessary to replace the condensate pump. Be sure to choose a high-quality pump that is designed for your specific model of air conditioner.

By following these steps, you can diagnose and repair a failing condensate pump and prevent water damage to your air conditioner.

3. Faulty thermostat replacement

If your air conditioner is not cooling properly, one of the first things you should check is the thermostat. A faulty thermostat can cause your AC to run continuously without cooling your home effectively. Here are some steps you can take to replace a faulty thermostat yourself:

  1. Turn off the power to the air conditioner at the breaker box before starting any work.
  2. Locate the old thermostat in the ductwork or on the wall near the unit.
  3. Remove the cover from the new thermostat and attach it according to the manufacturer’s instructions.
  4. Connect the wires to the new thermostat, making sure to match the colors and polarity as indicated in the manual.
  5. Insert the thermostat into the housing and secure it with screws or clips.
  6. Turn the power back on and test the new thermostat by setting the temperature to a comfortable level. If the AC does not turn on immediately, wait for a few minutes and try again.

By replacing a faulty thermostat yourself, you can save money on professional services and ensure that your air conditioner is running efficiently. However, if you are unsure about any aspect of the process, it is best to consult a professional HVAC technician who can safely handle the job.

4. Dirty air filter cleaning

A dirty air filter can cause serious problems with your air conditioner if left unchecked. Over time, dust and debris can build up on the filter, restricting airflow and causing the system to work harder than necessary. This can lead to increased energy consumption and reduced efficiency, as well as increased wear and tear on the components of the system. Thankfully, replacing or cleaning a dirty air filter is a relatively simple process that most homeowners can handle themselves. Before attempting any repairs, it’s important to ensure that the power to the air conditioner has been turned off and the unit has cooled down. Then, simply locate the air filter in the unit and follow the manufacturer’s instructions for cleaning or replacing it. It’s also recommended to clean the coils on the condenser unit periodically using a coil cleaner, which can help improve efficiency and prevent damage from accumulated dirt and debris. By taking care of these basic maintenance tasks, you can help keep your air conditioner running smoothly and efficiently for years to come.

5. Blower motor repair or replacement

If your air conditioner is not blowing cold air as it should, the problem may lie with the blower motor. The blower motor is responsible for pushing the cool air out of the unit and into your home. If the motor fails, the air conditioner will not function properly. Here are some steps you can take to repair or replace a faulty blower motor:

  1. Turn off the power to the air conditioner before working on it.
  2. Locate the access panel for the blower compartment. This is usually located in the attic or basement of your home.
  3. Remove the screws holding the panel in place and lift it up.
  4. Look for the blower motor inside the compartment. It will be a large, noisy device with wires coming out of it.
  5. Check the wires connected to the motor. If any of them appear damaged or frayed, have them replaced by a professional.
  6. If the motor appears to be functioning correctly, check the capacitor, which is located near the motor. A malfunctioning capacitor can cause the motor to fail.
  7. If the capacitor looks good, then the problem is likely with the motor itself. You may need to replace the entire unit.

It’s important to note that replacing a blower motor is not a DIY project. It requires specialized knowledge and tools. If you’re unsure about how to proceed, it’s best to call a professional HVAC technician.


In conclusion, learning how to perform basic air conditioning repairs can save you time and money in the long run. By identifying common issues such as refrigerant leaks, condensate pump failures, faulty thermostats, dirty air filters, and blower motor problems, you can take proactive steps to prevent them from causing major breakdowns. With a little bit of knowledge and some simple tools, you can fix most AC issues on your own and keep your home cool and comfortable all summer long. So, next time you notice your AC isn’t working as well as it should, don’t call a professional – try fixing it yourself!

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