Loud furnace noises come from all kinds of reasons. The problem is to understand the cause, and from there, see how the situation can be remedied. You may be able to fix some of the problems yourself; others will require the expertise of an HVAC specialist.
Loud noises coming from your furnace while it is running could be caused by any of a number of issues. For example, you may have a problem with the fan that blows hot air through your vents. That might be due to the fan bearings being worn out. In that case, these bearings will need to be replaced.
If your furnace is making a loud noise just as it starts, this could be caused by a serious problem called “delayed ignition.” This occurs when unburned oil builds up in the fire box chamber and is ignited all at once. This can be dangerous, and you should call a qualified HVAC specialist immediately. Read More