Why is My Furnace Blowing Cold Air

So have you realized that your furnace is blowing cold air when you turn it on? If yes then it could be as a result of multiple issues some of which you can solve by yourself while others require you to seek help from a professional heater repair expert. Having a furnace that is not working well especially during the cold season is something that no one would wish to happen. In this article, we are going to give you reasons why your furnace is blowing cold air.

1. Improper thermostat fan settings

One of the reasons why your furnace is blowing cold air is because the thermostat fan setting is not correct. If you check the thermostat fan settings, then you may realize that it is ON. If that is the case, then it means that the furnace blower will run constantly even when the furnace is not heating air. This will, in turn, make the furnace to blow cold air. The solution to this is simple. If you are familiar with your furnace, then all that you need to do is turn the thermostat settings to AUTO, not ON. The AUTO mode will ensure that the blower only operates when the furnace is heating the air.

2. Dirty filter

Another reason why your furnace may be blowing cold air is because of a dirty filter. A dirty filter can make the furnace to overheat. When this happens, the furnace will automatically shut off the burners but the fan will keep running. This makes the furnace to blow cold air. Overheating usually occur when there is restricted airflow which is often caused by the dirty air filter. The solution to this is replacing the dirty air filter with a new one. Note that frequent overheating can damage the heat exchanger forcing you to look for a replacement which is costly.

3. Dirty flame sensor

If your furnace is using a flame sensor to keep the furnace burning, then the reason why the furnace is blowing cold air is that the sensor is too dirty. To fix this problem, all that you need to do is clean the flame sensor and the furnace heating will be restored. You can do this by yourself if you are familiar with your furnace. However, if you lack knowledge on how to handle a furnace, then don’t hesitate to seek help from a reputable heater service.

4. Inadequate gas supply

Modern furnace usually shut down the heat exchanger if there is inadequate gas supply. Check to see if the gas system has problems and if that is the case then you need to seek professional help.

5. Improperly sealed ducts

When ducts are not properly sealed or if they have holes or cracks, then the furnace may be losing a lot of heat before it even gets to the vent. The best solution is calling a heater repair expert to check and fix the problem.

If your furnace is blowing cold air and you are wondering what you should do to fix the problem, then worry not because we are here to help. Regardless of how complex the problem may seem, our skilled and experienced staff will find a solution within the shortest time possible. Don’t hesitate to give us a call if you need heater repair, heater service or heater installation service. We promise to respond quickly to your call and give you quality services to ensure that your furnace operates efficiently for a long period of time.