If your heater is not heating your home evenly in Arlington Heights, IL, try the following steps:
Check and replace dirty air filters to ensure proper airflow.
Ensure all vents are open and unobstructed.
Consider balancing the airflow by adjusting dampers in the ductwork.
Verify that the thermostat is set correctly and functioning properly.
Schedule a professional HVAC inspection to assess ductwork, insulation, and the heating system for any issues requiring repair or adjustment.