Why Won’t My AC Unit Turn On? Top Reasons and Solutions

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Air conditioning is a crucial part of modern living, particularly during the scorching summer months. In North Ridgeville, the average summer temperature will sit in the mid 80s. But what happens when this heat is here and your trusty AC unit refuses to turn on?

Understanding the common reasons behind this issue and knowing how to troubleshoot can save you time, money, and a lot of discomfort. The experts at Climate-Tech explore potential reasons why your AC unit won’t turn on and provide practical solutions to get it running again.

Common Reasons Your AC Unit Won’t Turn On

If you’ve realized your AC has stopped working, don’t panic right away. There are several reasons why your AC unit may refuse to turn on, and some can be simple fixes. Here are some of the most common ones:

Thermostat Issues

One of the first steps in troubleshooting your AC is to check the thermostat. Your thermostat controls the temperature settings and signals the AC unit to start cooling. Common thermostat problems include:

  • Incorrect settings—ensure it’s set to “cool” and the temperature is lower than the room temperature.
  • Dead batteries—replace the batteries and see if that solves the problem.
  • Faulty wiring—worn-out or broken wires can disrupt communication between the thermostat and the AC unit.

Power Supply Problems

Another frequent culprit is the power supply. If your AC has power but won’t turn on, you may need to:

  • Check the circuit breakers—flip them off and back on to reset.
  • Inspect fuses—replace any blown fuses.
  • Ensure the AC unit is correctly plugged in and receiving power.

Dirty or Clogged Air Filters

Dirty or clogged air filters can cause your AC unit to stop working efficiently. When air can’t flow freely through the system, it can lead to overheating and shutdowns. Cleaning or replacing air filters is a simple yet effective way to maintain your AC unit. If you are replacing an air filter, follow these simple steps:

  1. Clean the grille with a microfiber cloth. For dust between slats, wrap the tip of a flat screwdriver with a microfiber cloth and gently clean in between, or use a vacuum with a brush attachment.
  2. Insert a new filter, ensuring it is the correct size and is correctly aligned.
  3. Close the grille cover and secure the latch.
  4. Remember to replace the air filter in your return air duct, air handler cabinet, window AC unit, and furnace, if applicable.

If you are cleaning an air filter, the steps are different, but still relatively simple:

Cleaning an Air Filter

  1. Turn Off the Power and Locate the Filter: Start by turning off your AC unit and locating the air filters in your home that need cleaning.
  2. Vacuum the Filter: Use a vacuum with a soft brush attachment and remove the debris from the filter.
  3. Wash the Filter: Using vinegar and water, soak and wash the filter in a sink or bucket using a low pressure setting to avoid damaging the filter.
  4. Dry it Out: Finally, let the filter air-dry entirely before placing it back in. This helps to prevent mold growth in your HVAC system.

When to Call for Air Conditioning Repair Services

Persistent Issues

If your AC won’t kick on after following the troubleshooting steps, it may be time to call a professional. Persistent issues such as unusual noises, frequent cycling, or poor airflow are signs that you need expert help with air conditioning repair.

Complex Electrical Problems

Electrical issues can be complex and dangerous to fix on your own. If you suspect an electrical problem, such as faulty wiring or a malfunctioning capacitor, it’s best to contact a professional technician rather than attempting a DIY fix.

Age of the AC Unit

The age of your AC unit can also be a factor in whether it’s worth repairing or replacing. With regular maintenance, an AC unit can last around 10-20 years. However, if your unit is older and consistently giving you trouble, it may be more cost-effective to invest in a new energy-efficient model

Preventative Maintenance Tips

Regular Filter Changes

Changing your air filters regularly is one of the simplest ways to maintain your AC unit. Depending on usage, air quality, and whether you have pets, you may need to replace filters more frequently. You should typically replace filters every few months. Clean filters improve airflow and efficiency, reducing the likelihood of breakdowns.

Scheduled Professional Inspections

Annual or bi-annual professional inspections and maintenance can identify potential issues before they become significant problems. A professional technician can check for refrigerant leaks, inspect the electrical components, and ensure the system is running efficiently.

Still Wondering Why Your AC Unit Won’t Turn On?

Understanding why your AC unit won’t turn on and knowing how to troubleshoot common issues can save you from uncomfortable days and costly repairs. If you followed our troubleshooting checks and still can’t seem to figure out why your AC unit won’t turn on, it’s time to bring in the professionals. Climate-Tech is available 24/7 for emergency services. Reach out to us today and ensure your home AC unit is running smoothly!

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