Timely Repairs- The Safety Of Your Furnace Depends On It

A gas furnace can be a valuable tool when you are trying to keep your living space warm during the winter months. It's critical that your furnace remains in good repair if you want to ensure the safety of your home.

Manufacturers construct gas furnaces with a number of safety devices that help protect your home against the potential dangers of a malfunctioning furnace. Learn more about these devices so that you will be prepared to make timely repairs should they break down and compromise the safety of your furnace this winter.

Heat Exchanger

One of the most important safety components in a gas furnace is the heat exchanger. A gas furnace relies on combustion to generate the warmth needed to heat your home. Carbon monoxide is one of the byproducts of this combustion process. Exposure to carbon monoxide can be deadly.

The heat exchanger is responsible for separating any toxic gases created during combustion and venting them safely outside your home. Cracks or other types of damage to the heat exchanger could allow carbon monoxide to infiltrate your home. Have a damaged heat exchanger repaired immediately by contacting an experienced HVAC technician.


Another important safety component on your gas furnace is the thermocouple. The thermocouple is located near the pilot light in your furnace. The primary responsibility of the thermocouple is to monitor the status of the pilot light.

If the pilot light goes out, the thermocouple will automatically turn off the fuel supply to your furnace. This helps to prevent an accumulation of natural gas that could easily combust if exposed to an open flame. If you smell natural gas when your pilot light is out or if your pilot light won't stay lit, you likely have a faulty thermocouple.

The damaged component should be repaired immediately to avoid a potential explosion within your home.

Limit Switch

A gas furnace can malfunction and begin to run too hot. The limit switch is responsible for automatically turning the furnace off when the internal temperature gets too high. Without the monitoring services of the limit switch, your furnace could overheat and completely shut down.

A new furnace would have to be purchased and installed in your home. The easiest way to diagnose a faulty limit switch is to monitor the function of your air handler. The limit switch signals the air handler to push heated air through your home, so the air handler will not kick on when the limit switch is faulty. For more information, contact local gas furnace repair services