Frequently Asked Questions About Furnace Repair
What are common signs of a furnace in need of repair?
Watch for rooms that never reach the thermostat setting, cold air from the vents, a furnace that turns on and off every few minutes, and new banging, rattling or squealing noises. Rising heating bills, a yellow burner flame and a breaker that keeps tripping also call for a diagnostic visit from Santos Mechanical.
Why is my furnace running, but no heat?
A furnace that runs without heating usually has a clogged air filter, a dirty flame sensor, a failed igniter or pilot, or a thermostat with the fan set to ON. A closed gas valve or an empty oil tank causes the same symptom. Check the filter and thermostat first, then call 484-890-4479 for a diagnosis.
Why does my furnace blow cold air while running?
Steady cold air means the burners are not lighting or are shutting off early. The usual causes are a dirty flame sensor, a failed igniter, or a clogged filter that overheats the furnace and trips its high-limit switch. A short burst of cool air at startup is normal; cold air that continues is not.
Should I repair or replace my furnace?
Repair usually makes sense when the furnace is under about 15 years old and the problem is one failed part. Replacement is worth pricing when the unit is 15 to 20 years old, needs repairs every season, or has a cracked heat exchanger. Santos Mechanical repairs and installs furnaces, so you can compare both options.
How frequently should furnace filters be changed?
Check a standard 1-inch filter monthly during heating season and replace it every 1 to 3 months. Thicker 4- to 5-inch media filters typically last 6 to 12 months. Homes with pets, allergies or renovation dust need more frequent changes, because a clogged filter restricts airflow and can make the furnace overheat and shut down.
