Why Is My Furnace Blowing Cold Air? Identifying Common Causes That Might Require HVAC Repair in Bridgeport, CTFebruary 1, 2018 11:05 pm Leave your thoughts
There is nothing worse than coming into your home from the freezing cold, only to find that your heating system is blowing out more cold air. There are a number of causes that could lead to this unwelcome discovery, and depending on the severity of your particular situation, you might find that you need HVAC repair in Bridgeport, CT right away:
- Thermostat: When you are having issues with your furnace, checking the status of your thermostat is a good place to start when trying to diagnose the issue. If your furnace is running but blowing out cold air, double check that the thermostat is set to AUTO, and not ON. If the fan setting is in ON mode, the furnace blower will run at all times, even when your furnace isn’t actually heating the air, and you will feel cool air coming from your vents. When on AUTO, the blower will only run when the air is being heated.
- Overheating: Believe it or not, something as simple as an old air filter that needs to be replaced could compromise the operation of your entire heating system. If a dirty filter is blocking the airflow, your furnace could overheat and cause the limit switch safety mechanism to kick in and turn the burners off. In these instances, the blower will keep operating in an effort to cool your furnace down, and you could feel cool air in your home as a result.
- Unlit pilot light: If your furnace utilizes a continuous pilot light, the cold air that you are feeling in your home could be the result of a flame that has blown out. If you are comfortable relighting the pilot safely, go ahead and do so, but you can always call a professional for help. You would also want to speak with a technician if the pilot light is constantly needing to be relit, because this is usually a symptom of a larger malfunction. For example, a gas valve that isn’t working properly because it has not been cleaned in a while could lead to your pilot light not lighting at all.
- Faulty ducts: Another common reason that you might feel cool air coming from your vents is if there are holes and leaks in your ductwork. Although the air coming from your furnace might be fine, if your ducts have areas for the warm air to escape, the result will be an uneven and potentially cool draft coming out of your vents.
As worrisome as these circumstances might be, these common issues can be held in check and in some cases prevented altogether with regular HVAC system maintenance. Here at BLM Refrigeration Heating & Air Conditioning, we offer services that include HVAC repair in Bridgeport, CT, as well as new furnace installations, routine maintenance and anything else that you might need to keep your family warm and comfortable this winter. Give us a call today so we can make sure your furnace is up to the task.
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