Air Conditioner is Not Turning On – Possible Causes and Solutions For AC Repair

When your air conditioner doesn’t power up, there are many steps that you could take to activate the equipment. This guide can help you along the way; it has information about common AC power problems and the solutions.

Tripped Circuit Breaker


The circuit breaker in your home is designed to prevent possible electrical fires. If your circuit breaker trips, the air conditioner and other appliances in the home may not receive power. You can prevent electrical overloads by using all of your appliances strategically in order to reduce excessive power consumption.



We have talked with Mr. Mike from regarding the tripped circuit breaker; he replied to us to restore power, you’ll have to reset the circuit breaker. Begin by opening the circuit breaker panel. Next, find the breaker switch that controls power to the air conditioning system. At this point, flip the switch to the off position. Then flip it to the on position. This process should restore power. If the air conditioner still doesn’t receive power, don’t reset the breaker again. Instead, contact an electrician and schedule maintenance for your electrical system.


Blown Fuse


The fuses that are connected to your AC unit can stop power flow if they malfunction. If you think that a blown a fuse is the reason why your air conditioner doesn’t turn on, you should conduct a continuity test with a multimeter.




During the test, you’ll need reading for both fuses that power your air conditioner. When the multimeter is connected, it should beep. A beep means that the fuses are functioning properly. If you don’t hear a beep, the air conditioner will require a replacement fuse from the hardware store.


Clogged Filter


Once your air conditioner’s filter can no longer block dirt and debris, contaminants will restrict airflow. Without proper airflow, the AC hardware won’t function properly. This happens because the lack of airflow causes water droplets to freeze on an air conditioner’s coils.




The only way to keep layers of ice off the coils is by changing your filter regularly. You can learn more about the maintenance requirements for your air conditioner’ filtration system in the owner’s manual.


Grimy Evaporator Coils


Whenever dust and dirt build up on an air conditioning system’s evaporator coils, the unit will operate less efficiently than it should. You’ll know when your system is experiencing this problem because the signs will be noticeable. The most common signs include


  • Temperature inconsistencies
  • Long heating and cooling cycles
  • Odd sounds throughout heating and cooling cycles





The best defense is preventative maintenance. If you schedule it every year, you’ll less likely encounter minor problems that can lead to a total system breakdown.


Grimy Condenser Lines


Because condenser lines hold moisture, they’re vulnerable to algae and mold. If anything grows on the condenser lines, an air conditioner will fail to start a heating or cooling cycle.




After you clean the condensers coils, power should restore to the air conditioner. To begin, shut off the main power supply that’s connected to your air conditioning system. Then lift the lid on the outside air conditioning unit and thoroughly clean the coils. You can eliminate dirt, dust, and mold on the coils with distilled vinegar or with a wet/dry vac.


Refrigerant Leak


In some situations, you may not know that your air conditioner is on if it only blows mild air. This problem occurs when an air conditioner has a refrigerant leak.


An air conditioner isn’t designed like a car. As a result, it won’t require a fresh supply of refrigerant on a regular basis.




When refrigerant is leaking, a professional air conditioner technician must resolve the problem. You should never try to stop a refrigerant leak on your own because you could experience refrigerant poisoning.


Defective Motor


One of the most important air conditioning components is the motor. Without it, an AC unit won’t have to ability to power up.


Typically, you can catch problems that relate to the motor early by using your ears. If you hear odd sounds when the air conditioner begins or ends a cycle, the motor is probably about to fail.




Usually, a technician can fix a motor if it’s still able to generate power. If repair isn’t an option, a technician will have to replace the motor. You can determine whether or not your air conditioner’s motor can be repaired by conducting a capacitor test.


Wiring Problems


Although most problems affect an air conditioner are traced back to its hardware, there are some issues that are caused by outside sources. The most common power-related issue is improper wiring. If your home has a wiring problem, you’ll encounter


  • Flicking lights
  • Buzzing sounds
  • Sparking outlets





If your home’s wiring is poor, you must follow two steps to restore power to the air conditioner. The first step is to hire an electrician as this is the only way to fix all underlying electrical problems. When the electrician is done, an air conditioning technician must conduct a diagnostic test.


Thermostat Issue


A thermostat is basically an air conditioning unit’s control panel. If it malfunctions, a heating or cooling cycle will never begin.




There are several ways to resolve a power problem that relates to a thermostat. The first step is to check the batteries. If the batteries are weak or completely drained, you can restore power by changing them. You’ll need to schedule AC maintenance or repair if your thermostat is defective or broken.


Leave a Reply