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Why is My Heater Blowing Cold Air?

When winter descends, nothing is as satisfying as turning on your heater and making your home cozy. However, you might be in for an unpleasant surprise when you turn on your heater and find cold air blowing out. This can happen for a number of reasons centering on your heating unit. It is important to make sure your heater functions properly.

Common Factors for When Your Heater Blows Cold Air

  1. Check the thermostat – Your thermostat controls the temperature indoors. If your thermostat is set to “on” the fan will continually blow air, even when the furnace is not heating the air. This is a relatively easy fix, where all you have to do is switch your thermostat to “auto.” If your unit is set to a low temperature, you may want to increase the degrees to blow warmer air.
  2. Furnace is overheated – Check to see if you have dirty filters. If so, this will block the air passages on your furnace, causing the unit to overheat. When it overheats, the limit switch turns the furnace burners off and blows a steady stream of cold air to cool it down. This can be the cause of the cold air.
  3. Pilot light is out – The pilot light controls the warmth in your home, essentially. Check if your light is on. If not, relight the flame. If it still does not light, you may have an issue with the gas or the thermocouple. Call a professional to look at your pilot light, as it can be dangerous to do without prior knowledge of the unit.

Don’t let a malfunctioning heater ruin your Indiana winter. Contact our HVAC technicians at Summers Plumbing Heating & Cooling today. Our team of professionals will determine and fix the problem so that you can enjoy a warm and cozy home. Call today for a free estimate.

Categories: Heating, HVAC
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Several times through the years we have called summers in a panic and every single time they have sent out someone very professional who took great care of us. I got several estimates recently for my ..." Rob L. - Noblesville

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Why is My Heater Blowing Cold Air?

When winter descends, nothing is as satisfying as turning on your heater and making your home cozy. However, you might be in for an unpleasant surprise when you turn on your heater and find cold air blowing out. This can happen for a number of reasons centering on your heating unit. It is important to make sure your heater functions properly.

Common Factors for When Your Heater Blows Cold Air

  1. Check the thermostat – Your thermostat controls the temperature indoors. If your thermostat is set to “on” the fan will continually blow air, even when the furnace is not heating the air. This is a relatively easy fix, where all you have to do is switch your thermostat to “auto.” If your unit is set to a low temperature, you may want to increase the degrees to blow warmer air.
  2. Furnace is overheated – Check to see if you have dirty filters. If so, this will block the air passages on your furnace, causing the unit to overheat. When it overheats, the limit switch turns the furnace burners off and blows a steady stream of cold air to cool it down. This can be the cause of the cold air.
  3. Pilot light is out – The pilot light controls the warmth in your home, essentially. Check if your light is on. If not, relight the flame. If it still does not light, you may have an issue with the gas or the thermocouple. Call a professional to look at your pilot light, as it can be dangerous to do without prior knowledge of the unit.

Don’t let a malfunctioning heater ruin your Indiana winter. Contact our HVAC technicians at Summers Plumbing Heating & Cooling today. Our team of professionals will determine and fix the problem so that you can enjoy a warm and cozy home. Call today for a free estimate.

Categories: Heating, HVAC