Common Problems with Air Conditioning Units in South Florida

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HVAC units in South Florida are fairly reliable, but there are times when people will have issues with the central air unit. Some of the minor

issues can be fixed easily. However, for the more complex problems, it is best to call a tech at United AC just to be on the safe side.

When a service call is placed at United AC, we'll send out a trusted technician to inspect the unit if it's not cooling or running properly. Here are

some of the most common items that we check.

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Filters. Filters get dirty and clogged from dust, pet hair and other particles. Once this happens, the filter needs to be changed. One way to tell if the filter needs to be changed is to hold it up to the light and see if you can see light pass through it. If you cannot, the filter needs to be changed. A dirty filter will reduce the flow of air to the unit causing the unit to freeze.

Drainage. The drain line in your HVAC unit could clogged with dirt, dust and even lint. If it is clogged, the drain pan will fill up and cause water to leak

over and create water damage.

Worn Contactor. There are three contactors in a unit: one for the compressor, one for the condenser fan motor, and one for the blower motor. The contactors

engage when there is a need for cooling or heating, making an electrical connection. This starts the compressor and motors. (The hum you hear

on some units when they first start) Arcing and pitting can form on the contactor making it hard for the electrical current to pass and start the

particular motor.

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GOUNITEDAC.COM Broward 954-428-7877 Palm Beach 561-994-9008

Breakers or Fuses.

Breakers and fuses protect the unit's motor or compressor against overheating, and is found in the evaporator coil. When a motor is suspected

of going bad, the breaker is one of the first things the technician checks.

Capacitors.

The run capacitor is used to help the motors of the AC unit run at a consistent speed. Start capacitors give the compressor a brief increase in

starting torque. If either capacitor burns out, it will need to be replaced for your AC unit to run smoothly

Thermostat.

This is the device that tells the system what to do and when to do it. Before calling an HVAC company, make sure the thermostat is on. Many

times the thermostat is accidentally turned off or is on the wrong setting.

Leaking Refrigerant.

Leaks can happen with vibration of the unit while it is operating. Refrigerant leaks in the condenser or evaporator coils cannot be repaired. If

the leak is found in another place the technician can remove what is left and charge the unit levels back to their correct amount.

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Compressor. This is the heart of the A/C unit. The compressor is located with the condenser coil. If the unit is undercharged with refrigerant, the

compressor will run hot and will eventually seize. If the unit is overcharged, your liquid refrigerant will get back to the compressor

and cause liquid slugging. It is important that the A/C unit has the proper amount of refrigerant.

Condenser Coils. These are located outside with the compressor. They are exposed to the outdoor elements, so they often get dirty and should be

cleaned at least yearly. This can be done with a water hose when the unit is not operating. If the dirt and grime get bad enough an

HVAC technician will have to clean the coil with a chemical cleaner.

Evaporator Coils. On split systems the evaporator coil is located in the attic, but on a package unit it is located outside with rest of the unit. If the coil is located

inside, cleaning will only be necessary if suggested and should only be about every three years or so. If the evaporator coil cracks, an HVAC

professional will need to fix the break.

If your home's central air conditioning system is not working the way it should give us a call today!!

GOUNITEDAC.COM Broward 954-428-7877 Palm Beach 561-994-9008

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Other Resources from United AC and Refrigeration

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