What’s Causing Your Furnace in Lake Bluff, IL, to Blow Cool Air?

Feeling cold air in your home during the winter in Lake Bluff, IL, makes you uncomfortable. Here are some common problems that can make your furnace blow cold air and what you can do about it:

Furnace’s Fan is “On”

Most thermostats have two settings for the fan: On and Auto. If you set it to On, it’ll blow even when your furnace isn’t producing heat, circulating cool air. Start by checking your switch, ensure you’ve set it to Auto and see if that solves the problem.

Dirty Air Filter

If your air filter is too dirty, your system won’t be able to draw in enough air to circulate the heat. This causes heat to build up and trip safety switches, which could turn off your system. However, it’ll continue circulating air to cool it, which makes it feel like it’s circulating cool air.

Plan to replace your filter regularly, about every 90 days for the common 1- or 2-inch filter. Check it monthly and gently vacuum off debris to keep it clear between changes.

Ignition Failure

Most furnaces have either a pilot light, hot surface or electric ignition to ignite the burners during a heating cycle. If there’s a problem with the igniter, including a blown-out pilot light, your furnace won’t produce heat.

You likely won’t feel any air coming out from your vents unless the fan setting is On. If that was the case and your furnace won’t cycle on, this could be the problem. These furnace repairs are best left to professionals who know how to fix the issue without damaging components or voiding any warranty.

Dirty Flame Sensor

The flame sensor shuts the gas off if it doesn’t detect a flame. A dirty flame sensor may keep your furnace from staying lit and cause cool air to come from your vents. This is commonly checked and cleaned during normal routine fall maintenance.

With our help, you can keep your furnace blowing hot air all winter long. Call to schedule your furnace maintenance with the NATE-certified service technicians at Carefree Comfort Inc. today.

Image provided by iStock

You May Also Like

Need New AC Installation
May 17, 2022

4 Signs Its Time for a New AC Installation in Highland Park, IL

An air conditioner is a piece of equipment that should last for many years if you maintain it well. Its efficiency may… Continue Reading 4 Signs Its Time for a New AC Installation in Highland Park, IL

Read More…

AC Maintenance
April 12, 2022

3 Ways AC Maintenance Can Save You Money This Summer in Lake Bluff, IL

Spring air conditioner maintenance prepares you for the summer in Lake Bluff, IL. Besides that, it can save you money in several… Continue Reading 3 Ways AC Maintenance Can Save You Money This Summer in Lake Bluff, IL

Read More…

Hvac Maintenance
March 22, 2022

Why Spring HVAC Maintenance Matters

To live comfortably in Highland Park, IL, you need energy-efficient cooling for the summer. Whether you own a heat pump or a… Continue Reading Why Spring HVAC Maintenance Matters

Read More…

Compliance Settings
Increase Font Size
Simplified Font
Underline Links
Highlight Links