High-efficiency furnaces, also known as condensing furnaces, can save homeowners a lot on heating and cooling costs but will require some maintenance if there is a malfunction. Fortunately, we here at Maple air have some tips that you can use to help you identify the problem. Here are some tips to help you fix your faulty high-efficiency furnace.

Faulty Thermostat
The very first component you want to check, after making sure the furnace’s power switch wasn’t just turned off, is the thermostat controlling the furnace. If the thermostat is a digital one, some potential issues, such as loose connections, a dead battery, and a blown fuse, could be responsible for your furnace not working.

Clogged Furnace Filter
As with any heating and cooling system that implements a filtration system, a clogged furnace filter can easily cause your high-efficiency furnace to overheat, which will activate the high-temperature limit switch that controls your furnace. Replacing the filters regularly with high-quality filters made of fiberglass or pleated paper will ensure that your furnace is running efficiently and producing clean hot air.

Faulty High-Temperature Limit Switch
From this point, any other possible issue will be found in the actual furnace itself. If the previously mentioned high-temperature limit switch is the component that’s malfunctioning, you will need to replace it with a new switch. This switch can be tested with a volt-Ohm-meter or multi-meter.

Broken Hot Surface Igniter
Most high-efficiency furnaces employ an ignition device called a hot surface igniter. Electricity passes through this igniter in order to ignite the fuel gas in the burners. Because these hot surface igniters are typically made of some form of silicon compounds, they are more susceptible to cracking and breaking. If yours is broken, then you will need to replace it with a new igniter.

Obstructed Flue Vent Pipe
A common area that you can check if your condensing furnace has stopped running is the flue vent pipe. If the vent pipe is obstructed, this could cause the pressure switch to activate, turning off your high-efficiency furnace.

These are just a few of the many different possible issues that a faulty condensing furnace may encounter. If your high-efficiency furnace is malfunctioning, please contact us at Maple Air Heating & Cooling today.