Dealing with an air conditioner that won’t turn on can be frustrating. While a tripped circuit breaker is a common cause and usually an easy fix, there are instances where the problem may be more complex, such as defects in the electronic control board, a malfunctioning thermostat, a blown fuse, or issues with the power cord. Our experts at Air Repair Pros have tons of experience diagnosing and repairing AC problems and so with this article, we’ll provide you with simple solutions to try. Keep reading to learn more!
Quick Tip. Before diving into troubleshooting, there’s a simple fix that often resolves a seemingly powerless air conditioner: resetting the thermostat. A quick reset can sometimes clear up communication issues between the thermostat and your AC system. If this doesn’t work, read on for other things you can try to turn your AC back on.
Troubleshooting your AC
Check the Circuit Breaker
The first step in troubleshooting an air conditioner that won’t turn on is to check the circuit breaker. Locate your home’s electrical panel and find the circuit breaker labeled for the AC unit. If it’s tripped, reset it by flipping the switch to the “off” position and then back to the “on” position. Try turning on your AC again. If it still doesn’t work, there may be another issue.
Inspect the Electronic Control Board
If the circuit breaker is not the problem, the issue could be with the electronic control board. This component is critical in controlling the various parts of your central AC system. A malfunctioning control board can prevent the compressor or fan from turning on. Check the board for a blown fuse, following the instructions in your user manual. If you’re unsure how to proceed, it’s best to call a professional AC repair service for assistance.
Troubleshoot the Thermostat
Now, let’s delve deeper into troubleshooting the thermostat. It plays a crucial role in monitoring room temperature and signaling the compressor to cool your home. Here’s how to check it:
Check the Power Source: First, ensure the power source to your AC system is functioning correctly.
Listen for a Click: Turn on the temperature control and listen for a click noise. This indicates the thermostat is sending a signal.
Test Thermostat Continuity (Optional): If everything seems normal but your AC remains off, you can test the thermostat’s contacts for continuity using a multi-meter (caution advised, consult a professional if you’re uncomfortable with this step).
Power Cord and Outlet Check
Another possible cause of your AC system not turning on could be an interruption to the power supply due to a faulty power cord. To test this, try plugging another appliance into the outlet to ensure it is supplying power. Check the power cord for any damages, such as fraying. If your AC system has a circuit breaker in the cord, check if it’s tripped and reset it if necessary. If the breaker has not tripped and the air conditioner still has no power, there may be another problem. In this case, if you are unable to resolve it, call Air Repair Pros and a technician will diagnose and fix the issue
Most probably, the technician will use a multi-meter to remove the cabinet and test the terminal strip for voltage. The technician will either repair the power cord or replace it. In most situations, experts recommend replacing the cord.
Blown Fuse
A blown fuse is another common reason your air conditioner may have no power. This can cause the AC to not work properly or not turn on at all. The fuse protects the electronic control board. To fix this, unplug the AC and remove the cover of the cabinet to access the fuse near the circuit board. Replace the fuse if it is blown. If you’re unsure how to do this, you can call a professional service to fix the problem.A blown fuse is another common reason your air conditioner may have no power. This can cause the AC to not work properly or not turn on at all. The fuse protects the electronic control board. To fix this, unplug the AC and remove the cover of the cabinet to access the fuse near the circuit board. Replace the fuse if it is blown. If you’re unsure how to do this, you can call a professional service to fix the problem.
Malfunctioning Thermistor
It’s also possible that your air conditioner has now power due to a malfunctioned thermistor. This component controls the function of the AC parts by monitoring the temperature of the air in the room and sending signals to the control board to start the compressor and circulate cool air. Refer to your user manual to test the thermistor. If you can’t do this yourself, a technician will check the thermistor and the control board for any issues.
When to Get Your AC Repaired
While there are some easy fixes for these issues, it’s often best to seek professional help. Air Repair Pros is a professional, reliable, and affordable Frisco HVAC company that serves the entire North Dallas area. Contact us, and we’ll send a technician to diagnose and fix the problem with your air conditioner right away!
