Why Your Furnace or Heat Pump Is Blowing Cold Air?

Why Your Furnace or Heat Pump Blows Cold Air?

When the weather in Houston, TX, gets cold, people rely on their heat pump or furnace to keep their homes warm. The last thing anyone wants during the winter season is a heat pump or furnace blowing cold air. However, this problem can surface at the worst possible time. When it does, you would want to know what’s causing the issue. The problem could be simple, and you might be able to fix it on your own. However, sometimes there could be a major issue that might be causing your heat pump or furnace to blow cold air.

Heat pumps and furnaces blow cold air for different reasons because of each appliance’s method of heating the air. Heat pumps use electricity while furnaces use gas to generate heat. We will explain what causes the furnace or heat pump to blow cold air so that you can deal with the issue and get it fixed. Remember that if you can’t find out what’s causing your furnace or heat pump to blow cold air, call an HVAC professional instead of attempting to repair the unit on your own. Attempting DIY repairs could make things even worse for you and cost you hundreds of dollars in repair work.

Why a Furnace Blows Cold Air?Why Your Furnace or Heat Pump Blows Cold Air?

  • Thermostat Set to ‘On’
    If you notice that your furnace is blowing cold air some of the time and hot the rest, your thermostat might be set to ‘on.’ The correct setting is ‘auto.’ When you set the thermostat to ‘on,’ the fan will continuously blow air, even when the burners aren’t running. As a result, your furnace will blow cold air while wasting energy. There is a simple fix to this problem – just set the thermostat to ‘auto’ position. If this doesn’t fix the issue, there might be another problem, and you will have to call an HVAC professional in Houston, TX, to check your furnace.
  • Overheated Furnace
    The furnace uses the heat exchanger component, made up of metal coils, for heating the air. Sometimes the heat exchanger would get too hot and start overheating. The system of a furnace is designed to sense overheating, and it will turn off the burners to prevent overheating. However, the fan will keep blowing air down the heat exchanger, and as a result, cold air will come through the vents. A furnace can overheat due to several reasons, but the most common one is restricted airflow. Check your air filter and make sure it is clean. Try replacing the air filter. If this doesn’t fix the problem, call an HVAC professional in Houston, TX, to check what’s causing the problem.
  • No Gas Supply
    A furnace requires a constant supply of gas to provide hot air to your home. If the gas supply is cut off or too weak, the pilot light won’t stay lit, and the furnace will blow cold air into your home. Check the gas valve and make sure that it is turned on. If this doesn’t help, there might be another problem that is preventing your furnace from blowing hot air. Don’t try to check your furnace on your own. Instead, call an HVAC technician in Houston, TX, to determine what’s causing the unit to blow cold air.
  • The Pilot Light isn’t On
    In older furnaces, permanent pilot light is used for igniting the gas for the burner. When this light goes out, the furnace won’t be able to heat the air. You should be able to find instructions on how to relight the furnace’s pilot light. If the pilot light keeps going out, there might be another issue that will require a professional’s help.

Why a Heat Pump Blows Cold Air?

  • The Pump is Set to ‘Defrost Mode
    While in heating mode, the outdoor coils of your heat pump can freeze over. The heat pump protects the coils by switching to ‘defrost mode’ automatically. This cycle typically lasts for a couple of minutes. Check whether steam is coming from your heat pump or not. If there isn’t any steam, it means that your heat pump is still in defrost mode.
  • Faulty Components
    If your heat pump is continuously blowing cold air, the unit might be experiencing problems that only an HVAC professional would be able to identify. These could include faulty components, bad reversing valve, refrigerant leak, or your heat pump might have lost efficiency because of age. Faulty reversing valves and refrigerant leaks are dangerous and complicated. Only a certified professional should handle them. If you believe that the components of your heat pump are malfunctioning, call an HVAC technician in Houston, TX, to check the unit.

Final Thoughts

Furnace or heat pump can blow cold air due to the reasons we have listed above. It can be frustrating to find your unit blowing cold air when the temperature is below the freezing point. When your furnace or heat pump starts blowing cold air, and you can’t find what’s causing the issue, don’t hesitate to call professionals. At Air Majesty, we can check your furnace or heat pump and fix it for you so that you can enjoy the winter season without feeling uncomfortable in your home. Call us if you are experiencing any issues with your heat pump or furnace, and we will arrive at your doorstep to address the issue. For questions or queries, feel free to reach out to us. We will be more than happy to help you out.

Contact Air Majesty A/C & Heating Today For Furnace or Heat Pump Inspection!