Reasons You Might Need a Furnace Repair Service Hypothetically, there are numerous reasons why you may require furnace repair services. Here are some of the leading causes of furnace failures. The Air Filters are Dirty If the air filters are clogged or dirty, the furnace will work hard to compensate for the lessened airflow. In this case, not only dirty air filters increase the energy consumption and power expenses, but the clogged air filter will damage the furnace’s limit switch that controls the fan. Learn more here. A Faulty Thermostat If the thermostat is not working optimally, you will experience discomfort at your house. The furnace will not heat the home as required, and the fan may work at inappropriate times. A damaged thermostat is another common reason your heating unit may cycle between off and on, which might need professional furnace repair services. Learn more about Traits of a Food Heater Servicing Company An Old Furnace Sometimes, the heating unit has r