7 Possible Reasons Why Your Furnace Is Blowing Cool Air

For the most part, typical Alabama Winters are not harsh. Fluctuating temperatures may lead you and others feeling as if they need to adjust the thermostat to get to a comfortable temperature.  When we are hot, we want A/C and when we are cold, we want heat.  But what happens when our furnace is blowing cool air?

Here are 7 reasons why your commercial furnace may be blowing cool air.

  1. Incorrect Thermostat Settings
    As mentioned earlier, our winters can be inconsistent.  As a result, you may have multiple people trying to adjust the thermostat settings to create a environment that is comfortable for them.   To reduce the constant thermostat changes some offices have implemented lock boxes around the thermostat or have a Building Automation System that will regulate the environment.  If you are interested in more information regarding a Building Automation System, contact Hardy Services.
  2. Thermostat Location
    We have all heard; location, location, location.  This also applies to your thermostat location.  If the person in the room where the thermostat sensor is located is running a space heater the sensor will be reading a higher temperature for the space and the result may be a cooler air flow into other rooms.
  3. Empty Oil Tank
    If you have an oil-fired furnace, you may be out of fuel. If so, your blower may keep circulating cool air even after the burner fails to light and produce heat.
  4. Issue with Computerized Controls
    If you have a building automation system, you may need to reset the system by turning the system off, wait a few seconds, and then restart your system. This is similar to rebooting a computer. If the furnace still blows cool air, call a professional. (Check out our Climate Controls blog)
  5. Valve Problem
    If your pilot light won’t light at all, you may have a faulty gas valve. Or, if your system has not been cleaned in a while, a valve could be stuck due to dirt and debris. Have your system cleaned and inspected by a professional. (Check out our Furnace Preventative Maintenance blog)
  6. Clogged Air Filter
    Filters can become clogged with dirt and debris. When the filter is clogged, ignition can be affected, and the result is your furnace blowing cool air. Replacing or cleaning a filter can be a messy job. Leave it to the professionals.
  7. Dirty Oil or Gas Burner
    If the furnace burner itself is neglected, accumulated dust and grime can cause trouble in igniting. Have your system professionally cleaned to take care of this problem.

The reasons listed above could be prevented with a Preventative Maintenance program from Hardy Services.