Clogged Drain Line

All HVAC systems have drain lines that remove condensation produced by the evaporator coil during the cooling process.  If one gets clogged, water could build up and overflow, causing sheetrock damage.

Weak Capacitor

A capacitor gives the motors in an HVAC unit the power boost they need to get moving. HVAC systems typically have several capacitors, all of which can fail. A failed capacitor will prevent a motor from starting and result in a total system malfunction.

Faulty Circuit Board

HVAC systems use electronic circuitry to control their various functions. While simple systems may only turn on/off, more advanced HVAC units may have multiple-speed blowers, reversing valves for heat pumps, dehumidification functions, emergency heating elements, and many more features. Bad circuitry can completely disable a system and may require a circuit board replacement for the system to work properly again.

Failed Motor

HVAC systems typically have a few motors such as the indoor blower motor and the outdoor condenser fan motor. If either of these motors malfunction, the AC system will not operate properly until repaired.

Refrigerant Leaks

HVAC systems operate with refrigerant in a closed-loop system. Ideally, the same refrigerant will last as long as the system does. If a leak develops, however, refrigerant will be lost, and the system will not work as effectively. For the system to work properly, a certified HVAC technician must find the leak, repair it, and replace any lost refrigerant.

General Cleanliness

A poorly maintained system can be your comfort’s worst nightmare. Clogged filters restrict airflow. A dirty outdoor unit can cause the operating pressures to get too high. A dirty evaporator coil can cause the system to freeze.