If you don't, this could end up being expensive to repair. You can prevent dirt from building up on your blower wheel by changing your air filters regularly. The blower wheel has blades that push the air and if it has dirt on it, it won't work as efficiently and might ultimately not work at all. If your furnace goes on and off too quickly, it could be a dirty blower wheel. If you have pets or allergies, you should be changing air filters every 60 days, or less if your allergies are severe. It's imperative you change your air filters about every 90 days unless you have pets or allergies. If you don't change your air filters often enough, the filters will become dirty and clogged, which means the heat exchanger retains heat and eventually causes it to overheat. There are several indirect issues that cause low airflow. If your furnace keeps shutting off, it could be due to low airflow. Below we go over some of the more common causes of why this might be happening. When your furnace is cycling on and off, it's called furnace short cycling. Or even a furnace replacement if it’s left for too long. This is a very common problem that if not diagnosed and corrected immediately could result in higher utility bills and major furnace repairs. Have you ever thought "Why does my furnace keep shutting off?" You are not alone.
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