It’s not common but sometimes you could be hearing loud noises coming from your gas furnace. Apart from being simply annoying, it also means that you need to inspect the furnace for any signs of breaking down. You could save hundreds of dollars if you identify a problem before it can damage important parts of your HVAC systems.

Is it normal for your furnace to make some noise?

Gas furnaces make some noise when opening and closing. If that’s the noise you are worried about, you can ignore it. If it’s annoying and you can’t sleep (furnace being close your bedroom), the only option would be to change its position or make your bedroom soundproof so that noise from outside won’t interrupt with your sleep.

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However, if the noise is louder than the noise your furnace produces as part of its regular operations, it could be a worrying sign. You should identify the noise and take action before it’s too late.


Here are some types of noises that all gas furnaces make. You can safely ignore them.

  • If your furnace has a inshot gas burner, it will make some noise when it burns the gas
  • Furnaces with induced draft or forced draft motor will also make some noise during gas combustion
  • Blower motor will also make some noise when blowing hot air through your HVAC system

Your furnaces is making loud noises

If your gas furnace is making louder noises, not the one you are accustomed to hearing when the furnaces is starting/closing or during gas combustion, it’s time to pay closer attention.

The first step to take when you gas furnace is making too much noise is to call an HVAC professional. A simple maintenance service could solve your problem. It could be simply a bearing making noise or some parts may have jammed over time that could be fixed with a little lubrication.

Regular maintenance could easily save you from a lot of trouble in the future. Sometimes, it’s just something blocking the vents and causing loud noises.

In case it’s not a regular issue that could be solved with quickly, the HVAC professional will do a thorough inspection. It could be any of the following problems causing this excessive noise.

  • Faulty ductwork could be a reason your furnace is making loud noises
  • Forced draft motor is producing a lot of noise during operations

If your problem is faulty ductwork, it’s going to cost you a lot. You will need to replace the entire ductwork.

In case the HVAC professional has diagnosed a faulty forced draft motor, you may have to replace it.

So, if your furnace is making loud noises, be sure to call an HVAC professional. In addition, be sure to conduct yearly furnace maintenance to identify faulty parts and leaks. You should check motors, belts, and change the filters in addition to cleaning the furnace. It should help you prevent furnace break down in most cases.

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