When the frigid weather finally arrives, in addition to you have to turn on your oil furnace for the first time after several months of not using it, the last thing you want to find is that it’s not working or is blowing cold air, and but, there is no reason to panic, because the solution may be an easy fix, but most problems you can official yourself, but in other instances though, you will need to call for help for an Heating in addition to Air Conditioning professional. If there is a constant flow of cool air coming from your oil furnace, check your control unit to see if the units fan is set to “on” or “auto.” Chances are, your control unit’s fan setting is set to “on”, in which case your oil furnace blower will consistently run even when your oil furnace isn’theating the air. By switching the control unit to “auto”, the fan will only blow when the oil furnace is heating the air, however pilotless ignition oil gas furnaces use a flame sensor to keep the oil furnace burning once it starts. If the flame sensor is dirty, your oil furnace will turn on in addition to begin heating but then turn cold quickly; You can scrub the flame sensor yourself if you choose, in addition to it will restore the heating function. If your gas oil furnace is older in addition to it’s blowing cold air, possibilities are its pilot light has gone out. You can call an Heating in addition to Air Conditioning contractor to make sure it is lit safety… Dirty air filters are a problem also because they limit airflow into your oil furnace, restricted airflow can cause your oil furnace to run longer to heat your home until it overheats. When it overheats, you will only get cold air. Replace your filter with a new in addition to scrub one in this case. If you still can’t figure out why your oil furnace is blowing cold air, contact an Heating in addition to Air Conditioning contractor to run some tests in addition to inspect your oil furnace in addition to figure out the cause of the problem.