It’s finally cooling off here in Bensalem, Pennsylvania. If you haven’t already, you will likely be turning on your furnace soon. However, life doesn’t always go as planned and our appliances don’t always work as well as you might hope. If you turn your furnace on and it starts blowing cold air, it can be frustrating.

There are multiple reasons why your furnace may be blowing cool air. If you need help, check out the tips below. If it is not a simple solution, call on the professionals at Modern Air Solutions in the Philadelphia area. You can do so here. You can also call (215) 490-3433. We will help you get your furnace working properly again so that you and your family can be warm and comfortable.

It Just Hasn’t Warmed Up Yet

Your furnace has likely been turned off for a while. This means it can take a little while to start up. If your furnace blows cool air for a few minutes after turning it on, it is nothing to worry about. It may just not be warmed up yet. This is normal. However, if it blows cool air for a longer period of time, there may be one of the issues below.

Thermostat Settings

The next HVAC part you should check is your thermostat. Thermostats have a variety of options that could be on the wrong setting or your thermostat could be malfunctioning. In the case of a furnace blowing cool air, you will want to check what your fan settings are. It will either be set to “on” or “auto.” If it is set to “on” the fan will blow air whether your furnace is on and heating the air or not. By setting your thermostat to “auto”, you can make sure the fan only blows air into your Bensalem home if your furnace is heating the air.

Dirty Flame Sensor

Have you been keeping up with biannual maintenance for your furnace? Scheduling biannual maintenance from a professional HVAC contractor like Modern Air Solutions is imperative if you want to keep your system running efficiently.

Neglecting maintenance can lead to a variety of issues, including your furnace blowing cold air. For instance, if you have a pilotless ignition furnace, a dirty flame sensor can cause your system to blow cold air. This issue can be tricky to resolve on your own. If you need help, contact Modern Air Solutions for help.

Pilot Light

If your furnace does have a pilot light, having it go out can cause your system to blow cold air. If you know what you are doing, you can try to relight the pilot light using the instructions in your furnace’s manual. Otherwise, a Modern Air Solutions technician would be happy to assist you. If you get the pilot light lit, but it won’t stay lit, there is likely another issue with your furnace. For instance, your thermocouple may need to be repaired or replaced.

It Overheated

Every furnace has safety features that turn off the burners if your system begins to overheat. If you feel cool air coming out of your air vents, this may be the cause. While the burners turn off, the blower keeps blowing to help cool off your system.

This issue is commonly caused by a clogged air filter. When the filter is clogged, the air can’t get through and your system will run longer to try and warm your home. However, running for too long causes your furnace to overheat. If you suspect this is the case with your furnace, try cleaning or changing the filter. If this doesn’t work contact Modern Air Solutions for help. We will help you figure out what is wrong and help you fix it as quickly as possible.