While your AC unit can perform great and keep your home cool if installed properly, there is always room for error and there are many reasons why your AC unit could stop working properly. Some of the reasons for nonperforming units include incorrect installation, poor service quality, and inadequate maintenance. At Bold City Heating & Air, we want to help you understand how issues arise and how we can fix them. Call (904) 966-4405 for the best air conditioning service in Jacksonville, FL.

Some Common Problems

Refrigerant Leaks

If your AC is low on refrigerant, it could have a leak, or it was undercharged when installed. If a leak is present, adding refrigerant won’t solve the problem. Our technicians can fix leaks, test the repair, and then charge the system with the correct amount of refrigerant.

Electric Control Failure

It’s common for compressor and fan controls to wear out, especially if the air conditioner turns on and off frequently or if the system is oversized. Our technicians can also check for electrical connections during service appointments to make sure the wires and terminals aren’t corroded.

Sensor Inaccuracies

Room air conditioning units have a thermostat sensor that measures the temperature of the air entering the evaporative coil. If this sensor isn’t located in the correct area or touches the coil, the air conditioner could constantly cycle or kick on at random times.


Humidity can sometimes cause air conditioning units to not drain properly. In this case, check the condensate drain to make sure that it isn’t clogged or being blocked by any debris. Room air conditioners may not drain properly sometimes due to incorrect mounting. If the unit isn’t leveled, the drains could become blocked.


Poor wiring can restrict power to the system and components like condenser motor, blower motor, and A/C compressor. Faulty wiring can also trip the circuit breaker and become a fire hazard.

Dirty Evaporator Coil

A dirty evaporator coil will restrict the airflow of your system, making your compressor and air conditioning system work harder, while not getting enough air into your duct system. When this occurs, your evaporator coils in the air handler will get clogged and eventually freeze up. It is recommended to have your condenser and evaporator coils cleaned at least every 2 years. Changing the filter regularly is also necessary to ensure that debris, dust, and particles do not get into your coils.

Contactor Closed

When your thermostat calls for cooling, the contactor gets energized (or closed) in order for high voltage to pass through to other components. At times, a faulty contactor will have melted or broken pads which will prevent high voltage to pass through.

Humming AC or Heat Pump Compressor

A faulty compressor will make a distinct noise. The reason for this could be low charge of Freon R-22 or Puron R410a.

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