What You Notice
Your furnace turns on, runs for a minute or two, then shuts off again. The house never really warms up, and you may hear the burner or blower repeating this same start-stop pattern. In Longmont winters, that gets uncomfortable fast.
Common Causes
Short cycling can come from a dirty filter, blocked vents, a thermostat issue, or a furnace that is overheating and shutting itself down. Sometimes the problem is simple, like restricted airflow from a clogged filter. Other times it points to a failing part that needs professional furnace repair.
What To Do Next
Start with the easiest checks. Replace the air filter if it looks dirty, make sure supply vents are open, and confirm the thermostat settings are correct. If the furnace still short cycles, avoid repeated resets and call a local HVAC technician. Pine Hollow HVAC helps homeowners in Longmont and nearby Boulder County communities figure out whether the fix is routine maintenance or a repair that should not wait.
