Some common furnace issues you can take care if without needing to call a professional. Try looking for these issues yourself first. If you discover these problems have nothing to do with your furnace, you’ll need to make a service call.

Clogged air filter

Clogged air filters are common furnace issues. If your furnace comes on and blows hot air for a short period, there’s a good chance that you have a clogged air filter. When dust collects on the filter, it diminishes airflow through the unit, and this can cause your furnace to shut down. Check for dirty air filters!

Thermostat Issues

One primary reason your furnace doesn’t work is that the thermostat isn’t set right. This is common with programmable thermostats since you might have created a program last spring and forgot about it when you want to cut your heat back on in September. Verify the temp setting and that your thermostat is set to heat, rather than “off” or “air.”

Here are some ordinary furnace issues you’ll want to call a Rochester HVAC Repair Expert about:

Ignition Issue

Contemporary gas furnaces don’t use standing pilot lights. In its place, they use either hot surface or intermittent pilot ignition to work the furnace. These are more effective than a standing pilot light since they’re not continuously burning a little amount of gas to keep the furnace ready to go. Most common is the hot surface ignition system, which is something similar to the filament in a light bulb. When the thermostat tells the furnace to switch on, electricity goes through the igniter and heats it. Like a standard light bulb, the igniter doesn’t last forever.

Burner Needs Cleaning or Adjusting

When the furnace is lit, it depends on a burner to heat the air that is pushed through your air ducts and flows into the rooms in your house. There are times the ignition system works fine, but the burner won’t light. Other times, the burner doesn’t work correctly. This could also lead to little or no heat at all.​