Before considering hiring an AC company to repair any damages, there are many signs to consider. The earlier you can identify when to hire an AC company, the better chances you can avoid expensive repair services.  Warm Air When your vents or ACs start releasing warm air throughout your house, you need to check your thermostat.  If your vents still release warm air after switching to cooling mode, there may be a problem with the compressor or airflow.  Loud Noise from AC An AC that needs repairing may produce weird loud noises that an AC should not be making.  If you hear grumbling, squeaking, and scratching when you use the AC, there is something wrong with it.  Poor Airflow Another obvious sign that indicates you need to hire an air conditioning company is when your units have poor airflow. HVAC companies recommend using a ventilator that can change stale air to a fresh perspective during system cycles. Water Leaks Condensation is normal if you have any cooling system in your house, but it shouldn't leak.  Suppose you spot accumulated water leaks or an ongoing leak near your air conditioner. In that case, it can signal that your AC is not working correctly. Broken Thermostat A thermostat is vital in an air conditioning system because it commands the AC. An indicator that your thermostat is not working is when it turns off after a short time or doesn't turn on.  Unpleasant Smell An unpleasant smell in your air conditioning system is not a good sign, so you must fix it immediately.  It may need a quick cleaning session if it is a minor issue, but in the worst case, you'll need a complex solution.  High Electric Bill No one wants a high electricity bill, but if your electricity randomly increases, there may be an HVAC problem.  The cause of this rise in the bill can be a broken AC compartment or a leak in the system that needs urgent repairs.