Approximately 90% of USA households own AC units, according to Bloomberg.com. However, most homeowners can't notice when their AC unit is working or not. Turning it off and on won't do much good, and tampering with a tool you don't understand can be dangerous both for you and the tool.

When your AC needs replacement or repair, it will tell you! You only need to learn these signs. Here are five signs that you need AC repair.

1. Poor Airflow

The unit's compressor might be failing whenever you notice poor airflow through your AC vents. If certain areas in your house get cold air while others don't, the issue might be with your ductwork. Therefore, it's a sign that your air conditioning needs urgent repair.

Debris can often get stuck in your AC vents. Debris obstruct smooth airflow and pose a health risk to you and your family. Ensure you clean your AC ducts to restore airflow and ensure your AC is working well when you need it most.

2. Unusual Smell

The moisture buildup in your AC unit's coil causes mildew and mold. This buildup of mold is dangerous for your health. When this happens, you will notice an unusual smell coming from your unit.

Don't delay contacting a pro if this happens. Your AC expert will help identify the problem and offer a solution right away.

3. Loud Noises

Your AC unit shouldn't produce louder noises than a mild hum. If you hear rattling or loud noises, it might be a sign that your unit has a problem with its belt.

Another reason for the rattling noises is a problem with the motor. In either case, contacting an expert is the best course of action!

4. Blowing Warm Air

Blowing warm air is a red flag that your AC needs repair. This isn't a problem that might work itself out.

Warm air from your unit is a sign that your compressor is faulty or your AC is low on refrigerant. Contact your HVAC expert immediately if you realize this problem to prevent further damage.

5. High Energy Bill

During summer, your energy bill might increase. However, if you notice a massive spike in your electricity bill, it is a sign that your unit isn't functioning properly. Call experts to help solve the problem and get your bill lowered next month.

Don't ignore your faulty AC unit. A broken unit makes your home uncomfortable and spikes your energy bill. It might be unsafe to run a broken AC unit in some situations. Rather than risking it, seek AC repairs from MC's Heating and Air now!