Why Is My Furnace Making Noises?
Why Is My Furnace Making Noises?
Furnaces, especially older furnaces will make some noise. Minor noises, like humming or small pops, are completely normal. Louder sounds, like thumping or squealing you should never ignore. These noises are a sign that something is wrong with your HVAC system.
Thumping Noises
Thumping or vibrating coming from your furnace is not something you should ignore. This sound is often caused by an unbalanced blower wheel. In some cases, it may be that the motor itself is not balanced. Left unfixed, an unbalanced wheel or motor can cause permanent damage to your HVAC system.
Squealing Noises
A squealing noise can be due to several different things. These include a bearing that needs oiling, a loose bolt, or a malfunctioning blower motor. Be sure to fix all these issues as soon as possible.
Humming Sounds
If you hear a humming sound coming from your furnace, this is an indicator that you have a faulty capacitor or fan. This hum will be louder and different than the sound of a normal running furnace.
Rumbling or Metal Scraping
If you hear sounds like nails scraping a chalkboard, this can be a problem with your furnace’s blower wheel. A rumbling sound coming from your HVAC system can be a sign that your burner is faulty.
Popping or Banging Noise
If you hear a banging noise coming from your heating and cooling system, this may be due to a dirty furnace burner. This is because it causes a delay in the ignition. As the gas accumulates, the igniter will cause a tiny explosion. This loud pop can lead to damage to your system, which can include a cracked heat exchanger. This can lead to a very expensive repair.
Another reason there is a popping or banging noise is due to expanding and contracting air ducts. As your air gas through them. This is a normal sound, and nothing to worry about. If you hear it sounds different, an HVAC professional should inspect your ductwork. This is to ensure that nothing is going on with it like holes or other kinds of damage.
CALL US TODAY
At Service Express Heating and Cooling, our HVAC professionals are here to help. If you notice strange sounds coming from your heating system, give us a call as soon as possible. Fast repairs will prevent bigger issues in the future.
