4 Reasons Your Furnace Doesn’t Shut Off in Irmo, SC

Is the furnace in your southeast Irmo, SC, home blowing air constantly? If so, you have an issue that needs professional help as soon as possible. Here, we discuss some of the most common causes of a constantly running furnace.

1. Dirty Air Filters

Having dirty air filters is the most common reason that a furnace doesn’t shut off. Dirt and debris clog the filters and reduce airflow, forcing your system to work much harder. With inadequate airflow, the system runs longer than necessary to achieve the desired temperature.

The extra stress on the system could also lead to premature failure and expensive heating repairs. To prevent this from happening, change your filters quarterly, or more frequently, if needed. If you have reusable air filters, clean them monthly.

2. Thermostat Problems

A faulty thermostat can prevent your furnace from shutting off. Thermostats communicate with your entire HVAC system, and if it’s not working, it gives the wrong instructions. For instance, it could have incorrect settings that cause the malfunction.

The thermostat could also be in the wrong location, such as near a heat source or in direct sunlight. To solve this, check the thermostat settings. If this doesn’t work, contact a professional technician to make the necessary repairs.

3. Pilot Light Issues

A constantly running furnace can be a result of a faulty pilot light. Gas furnaces have a pilot light that automatically ignites the burner to heat your home. If this has a problem, your furnace may run continuously and blow cold air only.

Unlike air filters that you can DIY, don’t try to fix this problem yourself. It’s a delicate component, and you might end up causing extensive damage to the system.

4. Leaking Ducts

Leaking ducts are a common problem in the HVAC system. Leaks cause your system to lose pressure, and they can result in a furnace that won’t shut off. The leaks can come through either holes or cracks and can be due to loosening joints in the ductwork.

The leaks not only affect your comfort levels, but they are also responsible for higher utility bills. If your ducts are leaking, you will need to have them sealed and any loose joints tightened down. Our technicians will inspect your system thoroughly and get it working effectively.

If your furnace runs constantly, the worst thing you can do is ignore it. Act immediately to save your system from extensive damage. For more information on HVAC maintenance, contact us at Krantz Kooling and Heating.

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