Power. When the ac compressor not working but the fan is running, chances are the outer unit housing the compressor isn’t receiving power. … Other potential causes may include a faulty thermostat, mismatched indoor and outdoor units, or the AC may just be old.
Turn off the AC from the thermostat and the circuit breaker. Check the fan for any debris or components it is contacting while spinning. Using your kick-start stick to manually spin the fan makes this easier. If you notice any debris, clear it out, turn everything back on, and listen to it again while it’s running.
Thereof, Can I run just the fan on my AC?
While it is true that the fan alone uses less energy than the AC, leaving it on will almost certainly result in higher utility bills. Running the fan constantly also increases your system’s maintenance needs. That’s because the more you run the fan, the faster your filter will get clogged.
Also to know is, Should you run the fan on your air conditioner? Keeping your fan on AUTO is the most energy-efficient option. The fan only runs when the system is on and not continuously. There is better dehumidification in your home during the summer months. When your fan is set to AUTO, moisture from cold cooling coils can drip and be drained outside.
Subsequently, question is, Why is my fan not working on my AC unit? One of the most common reasons fans stop spinning is because of a dead capacitor. The AC’s capacitors are small, cylinder components that send energy signals to power the fan motor and the rest of the AC unit. … Capacitors can go bad over time and need to be replaced.
Also, How do I know if my AC fan motor is bad?
– Turn the AC on – if the fan does not turn, there is an issue.
– While the AC is on, the rotation of the fan is notably slow.
– The fan is making a rattling noise as it turns.
– Turn the AC off – if the fan does not stop turning, there is an issue.
Does running the fan on my air conditioner use a lot of electricity?
A typical AC fan motor uses about 500 watts when it’s running. Therefore, if you run the fan continuously for a 30-day month (720 hours), you would use 360,000 watt hours (720 x 500) or 360 kilowatt hours (kWh). Therefore, the fan uses about 360 kWh per month in the ON mode.
How much does it cost to replace a fan motor in an air conditioner?
When your air conditioner’s fan motor breaks, it will typically cost about $300 to $600 to replace. It’s imperative to get this fixed quickly, since without a working fan motor your air conditioner’s compressor can be the next domino to tumble. Its repair is even more significant — usually running closer to $2,000.
When should I replace my AC fan motor?
Weak Airflow from the Vents If your blower motor is dirty or has a bad capacitor, you can call in an HVAC technician to fix the problem. On the other hand, if your motor is reaching the end of its service life, you should start looking for a replacement motor.
How long do AC fan motors last?
24 hours
Why is my AC fan still running?
Reasons your AC fan may be running continuously include: The fan is set to ON instead of AUTO. Thermostat is broken. The outside temperature is high.
Can you leave the AC fan on all night?
When you run the fan continuously, it causes the water to evaporate and puts it right back into your home. This means your home will not be effectively dehumidified, which makes it less comfortable. So, putting the fan in the “on” position compounds the error of having an oversized cooling system.
What does it mean when your AC unit fan stops spinning?
One of the most common reasons fans stop spinning is because of a dead capacitor. The AC’s capacitors are small, cylinder components that send energy signals to power the fan motor and the rest of the AC unit. … Capacitors can go bad over time and need to be replaced.
What causes AC fan motor to burn up?
One of the main reasons a fan motor might malfunction is dirt inside the cabinet. … Like any motor, an air conditioner fan motor can become overheated if it works too hard and doesn’t receive proper maintenance. If your AC has worked for you most of the summer, the stress could cause the fan motors to burn out.
Why is the fan not working on air conditioner?
Issues with the contactor The AC’s contactor switch, located inside your compressor unit, sends voltage to the condenser unit and fan so they will run. These switches can go bad over time, causing your fan to stop working properly. Contactors need to be replaced by an HVAC contractor.
What does the fan on the outside AC unit do?
The outdoor unit is usually located in the rear or side of your house and it is where the heat from inside your home is dispersed. It contains the compressor, condenser coil and a fan. … As the refrigerant passes through the condenser, a fan delivers ambient air across the condenser coil causing it to cool.
What does it mean when your AC fan won’t turn on?
If the fan won’t start even with a kick-start, and you hear the compressor running, you probably have a bad fan motor. This is more common with systems that are poorly maintained or that operate where a lot of dirt/debris is blown around by the wind. The only thing you can do about a bad motor is to have it replaced.
Why is my air conditioner running but not cooling the house?
If your air conditioner is running, but not lowering temperatures inside, one issue could be a blocked or clogged condenser coil. When operating correctly, the condenser fan draws air into the outdoor unit through the condenser coil to pull heat energy out of your home.
Don’t forget to share this post 
References and Further Readings :