It’s a hot summer day, and you try to turn on your AC to cool down, but nothing happens. The unit is completely unresponsive. On a warm day, there’s nothing more frustrating than an air conditioning system that won’t turn on. Not only does it impact the comfort in your home, but it also indicates a problem that needs to be fixed. If you’re experiencing this issue, don’t worry! Service Hero of Orange County is here to help you understand why your AC won’t turn on. Our skilled HVAC technicians have seen it all when it comes to AC problems. We know the common culprits behind a malfunctioning air conditioning system. Read on to learn more about the common reasons why your AC won’t turn on.
1. Faulty Capacitors or Motors
Air conditioners rely on capacitors to start the compressor and fans. If a capacitor fails, the system may not turn on at all. Similarly, the blower motor or condenser fan motor can fail. These issues require a professional technician for safe diagnosis and AC repair service in Brea.
2. Thermostat Problems
If the thermostat is set incorrectly, the AC won’t turn on. Ensure it is set to COOL and the temperature is lower than the current room temperature. Dead batteries in a battery-powered thermostat can also prevent the system from receiving the signal to start. In some cases, a malfunctioning thermostat may need to be repaired or replaced by a professional.
3. Tripped Circuit Breaker or Blown Fuse
Air conditioners require a significant amount of electricity to operate. A tripped circuit breaker or a blown fuse in your electrical panel can cut power to the system. Check your breaker box and reset any tripped breakers. If a breaker trips repeatedly after resetting, this may indicate a more serious electrical problem that requires a licensed electrician or HVAC technician.
4. Power Switch or Disconnect Issues
Many AC systems have a power switch near the indoor unit or an outdoor disconnect switch near the condenser. If the switch is turned off, the system won’t start. Ensure all switches are in the ON position. Sometimes, the disconnect switch can be accidentally turned off during maintenance or yard work.
5. Dirty or Clogged Filters
A dirty air filter restricts airflow, which can cause the AC to overheat or fail to start. Filters should be checked, and the air filter replaced regularly. A clogged filter can also reduce efficiency and put unnecessary strain on the system.
6. Frozen Evaporator Coils
Low airflow or refrigerant issues can cause evaporator coils to freeze. A frozen coil prevents the AC from operating correctly. If you notice ice on the coils or reduced airflow, turn off the system and allow it to thaw. Persistent freezing issues should be addressed by a professional, as they may indicate a refrigerant leak or airflow problem.
7. Low Refrigerant Levels
Insufficient refrigerant prevents the system from cooling and can trigger safety mechanisms that stop the AC from turning on. Low refrigerant is usually caused by leaks, which need to be repaired by a professional HVAC company.
8. Age and Wear
Older systems are more prone to electrical failures, worn components, and general inefficiency. If your AC is over 10–15 years old, multiple small issues can prevent it from starting, and replacement may be the most cost-effective solution. Call a local HVAC company to help you replace your failing AC.
AC Still Won’t Turn On? Call Service Hero of Orange County for AC Repair in Brea
There’s no reason to suffer with a malfunctioning air conditioning system. Call the pros at Service Hero of Orange County for AC repair in Brea and discover why your unit is not responding. We are a trusted HVAC company that specializes in fixing air conditioners, furnaces, thermostats, attic fans, and more. For decades, we’ve been offering dependable and budget-friendly HVAC services. Our highly trained and experienced HVAC technicians can diagnose why your AC isn’t working and perform quality repairs.
