Furnaces are reliable equipment, and they don’t go rancid quickly. But just like any other equipment, furnaces tend to act up sometimes. For instance, a furnace blowing cold air is one of the most common problems people face with their furnaces. In this post, we list some of the reasons a furnace won’t blow warm air.
Faulty Thermostat
The thermostat is the heart of a heating system. So, the first thing you need to do when your furnace doesn’t turn on is to check your thermostat settings. Make sure the thermostat is set to ‘HEAT’ mode. Sometimes, a dirty thermostat can also lead to faulty thermostat settings. Remove the thermostat cover and clean it properly to fix the problem. In case of any rust or corrosion, consider replacing the thermostat.
Dirty Air Filter
An air filter’s job is to ensure good indoor air quality and to prevent damage to an air conditioning and heating system. It does so by filtering airborne pollutants such as dirt, dust, pollen, and dander. But in the process, the air filter tends to clog quickly. If not replaced or cleaned regularly, the dirty air filter impedes the airflow, reducing overall heating. So make sure you clean/replace your air filters regularly.
No Pilot Light
No pilot light is another common reason a furnace won’t blow warm air. Usually, the issue occurs when there’s a lack of gas or electric supply. The issue might also occur due to a lack of maintenance or a thermocouple issue. Check if the gas or power supply is on or not. If supply is not a problem, clean the furnace to see if that works. If that also doesn’t help, call a furnace repair in Vancouver, WA to schedule a technician visit.
Duct Leak
Besides the above-mentioned issues, duct leak is a common reason a furnace does not blow warm air. The bigger the duct leak, the lesser the heating. To avoid such issues, you must get your duct serviced regularly. While some ducts may be easily visible to the naked eye, and you can fix them using duct tape, you will have to call an HVAC contractor to fix the duct-related issues in most duct leak cases.
Need an Expert?
The furnace is an electrical piece of equipment, so it’s best to let an expert fix it. You may perform a few basic troubleshooting steps, such as cleaning/replacing the air filter, resetting the thermostat, and cleaning the furnace. Get in touch with us at All Around Mechanical for advanced furnace repairs. We are one of the most trusted furnace service companies in La Center, Vancouver, Ridgefield, and nearby areas.