Unusual noises
While it's typical for your AC unit to emit some noise, any sudden or excessive sounds audible from upstairs warrant the attention of Watertown AC repair specialists.

Furnace
Installation

Air Conditioner Installation

Ductless Mini
Split Installation

Rooftop
Package Unit

Ductwork, Ventilation

Freezing unit
Before anything else, ensure your air filter isn't clogged, hindering proper airflow. If neglected, this can lead to unchecked coolant flow and subsequent unit freezing. Watch for signs like thawing ice or water accumulation.

Lack of airflow
If your AC unit is running but there's no air circulation through the vents, it's likely due to a malfunctioning blower fan failing to distribute cold air into the ducts.

Unpleasant odors
Certain smells, like mold or mildew, signal the need for duct cleaning. However, if you detect a burning odor emanating from your AC, it's a clear indicator of the necessity for AC repair.

Warm air
When your AC system blows warm air, it could stem from various issues such as a dirty air filter, malfunctioning evaporator coil, or faulty thermostat. Consulting a Watertown AC repair professional is advisable to diagnose the root cause.