Nothing is more frustrating than trying to turn on your furnace and not being able to get heat. There are a number of different possible causes for why your furnace isn’t putting out any heat, or too little of it. You will need a professional to examine your system to determine the exact cause, but we’ve outlined a couple of the possible explanations below for the sake of general information. Read on to find out more about why your furnace isn’t heating.
Now, this behavior technically does put out heat, but output tends to drop significantly as a result. Short cycling is when your furnace turns itself on and off every couple of minutes, and it is an extremely harmful condition. It is caused by the system overheating, often due to a clogged air filter, shutting down as an emergency measure, and then restarting. This constant stopping and starting prevents the furnace from completing a full heating cycle, which might be why your output isn’t very high. Short cycling also puts a lot of strain on the furnace, eventually causing it to break down completely. If you notice your furnace stopping and starting every couple of minutes, call for repairs immediately.
Broken Pilot Light
The pilot light is the part of the system responsible for igniting the natural gas in order to start the furnace. There are a number of different kinds of pilot lights, from standing flames, to electrodes, to heating elements. If your furnace isn’t starting at all, it’s quite possible that your pilot light has malfunctioned in some way. Fortunately, this often isn’t a threat to the rest of the furnace. Simply get the pilot light repaired or replaced, and everything should be fine.