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What Can Cause a Furnace to Stop Working?

Most furnaces are always working very well and are nice to use until they stop working. You can have a whole lot of problems trying to fix a possible problem. This can even get worse when you do not know the exact cause of the problem. What can cause a furnace to stop working? You’ll see.

It takes a lot of time to resolve some of the issues by yourself. That is why it is very important to make sure that you know what might have possibly caused your furnace to stop working. So what can cause a furnace to stop working. Let’s see and maybe get to know what you can possibly do to fix the situation.

Common Problems That Can Cause Your Furnace to Stop Working

Some of these problems are simple and can be fixed by just adjusting a single control while others are very complex and they will strictly require you to call in a professional to check and correct them. 

When it is worse, some parts or the whole system might need to be replaced entirely in order to work. It is important however to note the parts that you should check and attempt to rectify yourself and those that will need you to do something more than checking and finally those that require you to call in a professional. Some of the most common problems include the following;

  • The thermostat

A faulty thermostat can make your furnace switch itself off. However, sometimes it doesn’t have to be faulty to get the system down. If the thermostat is not set to heat, it cannot start the furnaces. 

Sometimes, when the furnace cannot display anything or do any other of its functions, it might have depleted the batteries or the wiring is faulty somewhere. Always set your thermostat a few degrees above the room temperature for it to start or initiate the heating cycle in the furnace. However, if the thermostat ceases to be functional, there might be a need to acquire a new one.

  • A tripped circuit breaker

The circuit breaker is the only bridge if the electric current that flows into the parts of the furnace that are responsible for igniting the furnace. They include the igniters which cannot start the flame unless there is an electric current. So if the circuit breaker has tripped, that means that there is no flow of current to the igniters and other parts that require an electric current to run.

The circuit breaker just needs to be reset to get working again. However, if it is the problem and it does not change, anything by resetting, it means that there is a bigger problem with the electrical section of the furnace that needs to be addressed urgently.

  • Incorrect positioning of the access panel

Some parts of the access panel might not be n their correct places. Some components of the access panel are automat d and they can cause the whole system not to work when they are not in their correct order. 

So this necessitates the whole access panel to be checked thoroughly. Some parts might need a professional eye to fix while others just need to be set back in place for them to start the whole furnace system. Be sure to inspect the access panel properly before going to any other part.

  • A clogged air filter

When the air filter gets clogged, it basically means that there will be no airflow in and out of the furnace.  This might result in a build-up of hot air around the heat exchanger which will cause the furnace to automatically stop in order to stop the system from blowing up. 

This could be the problem and unless the air filter is cleaned thoroughly, the system might not lose the air build-up and that would mean that it will not start. The air filter needs to be cleaned regularly. Sometimes you might need to replace the air filter entirely.

  • Dirty burners

If the burners are dirty, it means that the gas will not come out well and that might lead the system not to start. What you need to do is to carefully clean the burners and the burner chamber using a vacuum and a soft-bristled brush. 

First, you will need the while electric and gas system off. Then, access the combustion chamber, detach all the connections to the burners, and get them clean. However, since this is a critical operation, if you are not sure, you might need to just call in a professional to do it for you. The detaching is not a big issue but the fixing might be the biggest issue.

  • Faulty limit switch

The limit switch monitors the temperature around the room and regulates it by starting or stopping the furnace. When the limit switch is faulty, it can read the surroundings wrongly and cause the furnace to stop. You might need to replace the switch entirely or get a professional to come and get it fixed.

  • Unlubricated furnace parts

All the moving parts of the furnace should be lubricated. If they are not lubricated, there might be a build-up of heat from friction which might stress up the furnace and cause it to stop running. All that you need to do is make sure your motor and any other moving parts of your furnace are well lubricated.

What Can Cause a Furnace to Stop Working – A Final Word

It is always important to know what the problem might be with your furnace. Some problems are so easy to fix while others will need a technician to fix them. All those that we have seen above could be what can cause a furnace to stop working. 

You will need to get them addressed well to be sure that the furnace can run again. Additionally, you might need to make it a routine to check your furnace, maybe Carry out a tune-up for your furnace yearly and have your ducts cleaned every year too. This will keep your furnace working well through a long period of time and such problems will be minimal. 

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