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Furnace Stopped Working: A Troubleshooting Guide for Homeowners

“Hey! How come my furnace stopped working?” you exclaim as the chill from outdoors seeps into your home. Furnaces are sensitive systems with complex components. However, you can troubleshoot your furnace under certain circumstances. McCoy & Son Heating and Cooling, one of the top-rated HVAC companies in Marietta, GA, shows you the ropes below. 

The Furnace Stopped Working! How You Can Troubleshoot It

Don’t panic when your furnace stops working! It could have a simple, easily fixable issue. Check on your heating system to see if one of the listed solutions protects your indoor comfort. 

#1 Inspect the Filter

Most HVAC systems use some type of filter to eliminate particles from the air. These filters can become so dirty that air fails to circulate through the return vent. Open the return vent near the center of your home and inspect the filter. 

Replace it with a fresh one if it looks grimy and caked with dust. Your furnace should work properly again.  

#2 Remove Vent Blockages

If your furnace stopped working, it might have a blocked ventilation network. Most rooms throughout your home have at least one output vent for adequate air circulation. Your furnace might preemptively stop working because of hindered circulation. 

Check each output vent for obstacles like laundry piles, furniture, large toys, and cardboard boxes. If you notice these objects, move them to a different spot so they won’t disrupt airflow. 

#3 Look at the Thermostat

An unset thermostat can also keep your furnace from working. First, check the room temperature settings to ensure they are up to par with your needs. Then, make sure your thermostat is in heating mode rather than cooling mode. 

Next, change the batteries to see whether your thermostat needs a better power supply. Move on to the next recommendation if these instructions yield no results. 

#4 Check the Circuit Breaker

A furnace might suddenly stop working because of a tripped breaker. Power surges can send excessive electricity to the breaker. The breaker protects your electrical grid by cutting power to major appliances and networks. 

Open your fuse box to check the circuit breaker for your furnace. Flip the breaker if it tripped to the wrong side. 

#5 Inspect the Furnace Area

You can inspect a few components with some know-how if you have a gas furnace. Head to the furnace area to look for potential problems. Remove any belongings that might hinder the furnace’s performance. 

Then, ensure the gas valve is open. A closed valve prohibits gas flow, preventing the furnace from heating your home. Next, remove the front panel. 

You should see an ignited pilot light. If the pilot light doesn’t have a flame, it might have too much dirt and ash to stay lit. If you know how to, carefully remove and clean the pilot light. 

Otherwise, a call to a furnace repair company is in order. 

Can’t Find the Problem? Ask McCoy & Son Heating and Cooling for Help

Some problems require fixes from experienced technicians. If your furnace stopped working, call McCoy & Son Heating & Cooling for a professional troubleshooting and repair service.

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