Heater Fan Blowing But No Heat at Alfred Wilford blog

Heater Fan Blowing But No Heat. If your furnace’s pilot light is on but no heat is coming into your home, it can be frustrating and uncomfortable, especially during that cold night. The owner’s manual shows where the filter is and how to remove it. Install a new filter, restart the system, and check the air from the vents. If your heater is running but not blowing hot air, one of the first things you should check is the air filter. If your fan is not coming on it could be a bad heat sensing device or a bad relay (the fan motor and power supply seem fine as you state that it works under other circumstances). This sounds simple, but it’s a pretty common mistake. If no heat is coming off the vents even when the furnace’s blower is on, it could be due to wrong thermostat settings. A dirty filter also causes soot buildup on the heat exchanger, reducing the efficiency of the furnace and shortening its life. It will run cold at first because there is still cold air in the ducts, but the air should warm. There could be a few reasons. A neglected filter can cause a furnace to blow cold air because it overheats and tries to cool itself by blowing cool air through the ducts and into the home. In this case, you should ensure the thermostat isn’t set to cool instead of heat. A clogged or dirty air filter. If the blower is running but no heat is coming out, replace the filter. The fan constantly runs when it’s turned on.

If your fan is not coming on it could be a bad heat sensing device or a bad relay (the fan motor and power supply seem fine as you state that it works under other circumstances). Install a new filter, restart the system, and check the air from the vents. In this case, you should ensure the thermostat isn’t set to cool instead of heat. A neglected filter can cause a furnace to blow cold air because it overheats and tries to cool itself by blowing cool air through the ducts and into the home. A clogged or dirty air filter. If no heat is coming off the vents even when the furnace’s blower is on, it could be due to wrong thermostat settings. This sounds simple, but it’s a pretty common mistake. If your heater is running but not blowing hot air, one of the first things you should check is the air filter. It will run cold at first because there is still cold air in the ducts, but the air should warm. A dirty filter also causes soot buildup on the heat exchanger, reducing the efficiency of the furnace and shortening its life.

Furnace Blower Keeps Running But No Heat Troubleshooting Guide

Heater Fan Blowing But No Heat The fan constantly runs when it’s turned on. In this case, you should ensure the thermostat isn’t set to cool instead of heat. If your furnace’s pilot light is on but no heat is coming into your home, it can be frustrating and uncomfortable, especially during that cold night. If your heater is running but not blowing hot air, one of the first things you should check is the air filter. A clogged or dirty air filter. Install a new filter, restart the system, and check the air from the vents. There could be a few reasons. If no heat is coming off the vents even when the furnace’s blower is on, it could be due to wrong thermostat settings. It will run cold at first because there is still cold air in the ducts, but the air should warm. A dirty filter also causes soot buildup on the heat exchanger, reducing the efficiency of the furnace and shortening its life. If the blower is running but no heat is coming out, replace the filter. This sounds simple, but it’s a pretty common mistake. A neglected filter can cause a furnace to blow cold air because it overheats and tries to cool itself by blowing cool air through the ducts and into the home. The owner’s manual shows where the filter is and how to remove it. If your fan is not coming on it could be a bad heat sensing device or a bad relay (the fan motor and power supply seem fine as you state that it works under other circumstances). The fan constantly runs when it’s turned on.