It is more than an inconvenience to experience a furnace that is running but blowing out cold air in the winter. We understand you will want to find answers quickly when this happens, so here are some common causes to this problem:
Your Thermostat is the Culprit
If you check your thermostat and find that your fan setting has been set to 'on', you've found your answer. This is because the fan is going to come on at all times, even when the furnace is not generating warm air. To fix this is simple, just turn your fan option off, and that way, it will only run when the heat is on. You'll be toastier in no time.
Your Air Filter Needs to be Changed
When your filter is dirty, it can cause the air flowing out from the furnace to become blocked, and this can lead to your furnace overheating. When this happens, the furnace's limit switch will turn off the heat as a protective measure. The fan will cut on to cool off the furnace, and the result will be that cold air will blow out. The fix here is to switch out the filter. If this doesn't resolve the problem, contact your friendly HVAC specialists, as it could be something more serious that will lead to your furnace burning out completely.
If there is a hole in the ducting system, the heat will escape, and cold air will blow out. Fixing the holes will keep this from happening.
Whatever the problem, we are here to help. You can call us anytime, 24 hours a day to get service, as we understand that heating emergencies can happen at any time. We will be happy to talk with you and to answer whatever questions you may have. Contact us today!