Furnace short cycling after a filter or return-air restriction
Why it happens here
Compact homes can have limited return-air openings, and a dirty or incorrectly sized filter can further reduce airflow. During a cold spell, restricted air makes the furnace overheat and shut down before the thermostat is satisfied. The repeated starts increase wear and leave rooms unevenly heated.
Our approach
We inspect the filter size and condition, check accessible returns, and observe the furnace through a heating call. If airflow is the cause, we correct the restriction and verify that the system completes a normal cycle. We also identify any duct issue that needs separate attention.