Everyone in Michigan is starting to turn their furnaces on. The weather is getting cold and we are trying to stay warm! How frustrating if you turn your furnace on for the first time and it is blowing cold air! There are a few reason that your furnace may doing this and there a few things to check before you need to worry too much. At Eller Services we are here to keep you warm and toasty this winter. If you are having problems with your furnace, check these things first and then call us for help.

Check your Thermostat

Make sure your thermostat is set on the correct setting. If it is set to “ON” the blower will run constantly even when the furnace isn’t heating any air. And the air that comes through the vents will seem cool because it is room temperature air. Turn your thermostat to “AUTO”, now the fan will only run when the furnace is heating and you won’t get tepid or room temperature air.

Change the Air Filter

A dirty air filter will cause your furnace to overheat. It restricts the air flow in and out of your furnace which can cause it to overheat. If it does overheat, the safety control will shut off the burners causing the fan to blow cool air versus heated air through the house.

Check the Pilot Light

Your furnace may be blowing cold air because the pilot light has gone out. It is a simple fix, just relight the pilot. If it continues to go out after you relight it a few times, then you should call us at (248) 652-6650 or request service online. This is indicative of a bigger problem that requires professional help.

Reboot Your System

If you have a modern furnace, you probably have one that is controlled by a computer. Sometimes there is simply a glitch in the system and it needs a simple reset, the same way you would restart your computer or phone. If you turn off your furnace for 30 seconds and then back on, it may reset itself and begin functioning correctly. If it doesn’t start working the way it should after you have restarted the computer, call us at (248) 652-6650.


The older you ductwork is, the more likely it is to be damaged or leaky. If you have a damaged or leaky ductwork air can be escaping before it gets to the desired living areas. Inspect the ductwork yourself, but its possible that you may not be able to visually detect the rips or tears that are causing your leak.

If none of these work, you may be a bigger problem. Contact the professionals at Eller Services today to diagnose and fix any problem you might be having.

We proudly serve Rochester, Rochester Hills, Troy, Utica and all the surrounding communities. Check our service area page for more information or call our office if you are unsure if you are covered by us.