Turn on the fan for your HVAC system and listen for any unusual noises (squeaks, slams, or grinding). Contact a professional if you notice anything out of the ordinary. Next, turn on your heat and let it run for 15 – 20 minutes. This gives your system time to check itself out before it gets cold outside. If your heat shuts off before meeting the set temperature, you may need a HVAC professional to diagnose the problem.
Tip – Furnaces typically have an "error indicator" light on the front cover. Usually a slow light flash indicates the system is running normally. If you see fast flashing, your furnace may need service.
Tip – A slight odor is common when turning on your heating system for the first time in fall. Turning on your heat early gives you a chance to open the windows to clear the smell. If the odor persists, call your HVAC professional.