What Would Cause my Heater to Blow Cold Air
Originally published December 2013, updated December 2016
Cold air coming from the heat registers in your Jacksonville, Florida, home during winter must be addressed as soon as possible. You may be able to resolve the problem without a service call, making it worthwhile to do a little bit of troubleshooting first. Understanding why your heater is blowing cold air could save you a lot of time and money.
If you are just starting your system for the first time, the cold air may be quickly replaced by warm air. Prior to heat kicking in, the air in your ducts will be comparable to that throughout the house. It may be even colder if your crawl spaces are chilly or if there isn’t any insulation around your ducts. As this cold air is moved out of the system, hot air will follow.
If cold air continues to blow through the system, there are several possible causes. Lack of gas to your furnace is one possibility. An issue with your thermostat could also affect your system’s operation. Make sure that your thermostat is set for heating. Verify that the temperature setting is greater than the current room temperature. Check your battery as well.
The pilot should be lit. If it’s not and won’t relight, you will need to check the fuel supply. Your gas valve may have been shut off inadvertently.
Time for Professional Input
If your troubleshooting efforts don’t resolve the problem, contact a professional. Electronic components could be at the root of the problem. You could also be dealing with a failure in a burner or heat exchanger. Your technician will work through a series of tests to pinpoint the exact source of trouble.
One of the best ways to avoid heating problems is to schedule preventive maintenance in the fall. Mike Merritt Heating & Air Conditioning can provide tuneup services to ensure that your equipment is optimized for safe and efficient operation this winter. We can also handle any heating system repair needs. Contact us today at 904-240-4038 to schedule an appointment.