We all know that furnaces can sometimes break down or stop working properly. But before calling your local HVAC repair technician, checkout our basic troubleshooting guide. You may be able to take care of common furnace issues yourself and save money on a service call.

Heating system symptom checker

Thermostat Anytime you have furnace problems, your first step should be to check the thermostat. Ensure it is set higher than room temperature and set at “heat.” Turn the fan switch to on. If the fan doesn’t turnon, it’s possible the furnace isn’t getting power or the motor is broken.

Filter A dirty filter can cause your furnace to stop working. How often you change your filter will depend on your furnace, the type of filter and your lifestyle. To change your filter, remove the old, dirty filter and replace with new one. Wait 30 minutes before hitting the reset button. If the unit still doesn’t start, try the reset button once and wait 30 more minutes. Ensure that your furnace door is on property after changing the filter as this can prevent the furnace from starting.

Is the furnace on? Double check that your furnace is turned on. Start by checking the breaker in your electrical panel. If the breaker was tripped, check for loose connections before turning it back on. Also make sure that the furnace switch is turned on. The switch is usually located in the basement, either near the furnace, by the basement stairs or inthe ceiling.

Pilot light If you furnace has a standing pilot light, make sure that it’s lit. You should be able to see it when you open the combustion chamber door. If it’s out, follow the furnace lighting instructions and re-light.

Look for blockage If you’ve checked all of the above, see if any debris – snow,ice, weeds or grass – are blocking your furnace venting.

Blower fan Not all furnaces have a power button for the blower fan, but if yours does, check to make sure it’s on.

Call a professional If you’ve followed our above furnace system checker suggestions and your unit still isn’t working, it’s time to contact your local American Standard Customer Care dealer .