Why a Furnace Isn’t Keeping House Warm

We often think that an appliance works, or doesn’t. But it’s deeper than that. 

Take the furnace, for example. You may hear it turn on, listen to it cycling, but it isn’t keeping the house warm. You feel colder than usual. You reach for the thermostat, moving it up. 

A furnace is an essential home appliance, especially in cold weather. It is designed to keep you safe and comfortable. However, if your furnace isn’t keeping your house warm, it can be frustrating, even dangerous. What’s wrong? And what can you do about it?

Dirty air filter

A dirty air filter is one of the most common causes of a furnace not keeping a house warm. The air filter in your furnace filters the air that enters your home. Over time, the filter can become clogged with dirt, dust, and other particles, reducing the airflow and the furnace’s efficiency. A clogged air filter can also cause the furnace to overheat, damaging the system. It is recommended that you change your air filter every one to three months, depending on the type of filter and how frequently you use your furnace.

Thermostat issues

The problem might not be your furnace at all. The thermostat is responsible for controlling the temperature in your home by communicating with the furnace. If the thermostat isn’t working correctly, it may not be sending the correct signal to the furnace. This can lead to turning it on and off at the wrong times, or not turning it on at all. A quick inspection will alert you to whether it’s not working, or whether you need to replace it or have it repaired by a professional.

Poor insulation

Insulation is responsible for keeping the warm air inside your home and the cold air outside. If your home isn’t adequately insulated, the warm air can escape, and the cold air can come in, making it difficult for your furnace to maintain a set temperature. If you suspect your home needs insulation, a quick inspection can alert you to where you can improve.

Ductwork issues

Ductwork distributes warm air from your furnace to the different rooms in your home. Over time, ductwork can wear down, leading to leaks, blockages, or damage. It allows warm air to escape before it reaches its intended destination. This can cause your furnace to work harder than it should, reducing its efficiency and increasing your energy bills. 

Age of the furnace

Things eventually wear out, including your furnace. Furnaces typically last between 15 and 20 years, depending on the make and model. If your furnace is approaching or has exceeded its lifespan, consider replacing it with a new, more efficient model. 

If you are experiencing problems with your furnace, it is essential to have it inspected and repaired by a professional to ensure that it is working efficiently. By taking care of your furnace and promptly addressing any issues, you can keep your home warm and comfortable all winter.