Several factors large and small could be causing your home to have areas that are warmer or cooler than others.
A dirty air filter or another dirty component could be messing up the airflow.
You could have moved furniture in front of a vent, blocking airflow.
Or there may be tears in the ductwork, an air leak into the home from outdoors, or deteriorating or missing insulation.
Often one room is larger than the others, which means it simply needs more time than smaller rooms to reach your desired temperature.
Your heating, ventilation and air conditioning system may not be the right size for your home. Too big and it will cycle on and off before reaching the target temperature. Too small and it will strain to do its job.
A possible solution
A ductless mini-split will heat and cool the air in one or more rooms. This lets you customize the temp and eliminate the hot or cold zone.
You can even get a mini-split that will heat and cool as many as five areas.
A ductless mini-split offers more energy efficiency as well as a solution that makes all rooms equal in comfort.
Premier HVAC has installed mini-splits in homes and businesses in Manhattan, Queens, Brooklyn and Long Island.