Read reviewsUpdated: February 24, 2026
Hearing a loud or unusual noise coming from your heater is worrisome to say the least.
These noises can be caused by a variety of problems. Some issues you may be able to resolve yourself, while others may require a licensed Houston HVAC repair expert.
Whistling
A whistling furnace could be the result of issues with your ducts. Your furnace may need more airflow than your ducts can provide, in which case the answer may be installing larger ducts.
Before you do that, make sure there aren’t any gaps in your ductwork. Gaps in the ducts, especially at the point where the duct joins the furnace, can also cause the furnace to whistle. If the whistling is a recent development, it may even be due to a clogged filter. You can test this theory by removing the filter to see if the whistling stops.
Rattling
This could be caused by loose ducts. You can try reinforcing the ducts with additional screws or duct tape. Adding cork or rubber pads underneath the furnace may also help alleviate the problem. Simply use a pry bar to lift the unit, allowing you to slide the pad underneath.
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Bouncing
A bouncing noise coming from the motor may indicate that the bearings are worn and need to be replaced. Your best solution for this problem is to call an HVAC professional.
Banging
A banging sound as your furnace turns on can be caused by a couple of different problems. If the sound appears to be coming from the ducts, they may simply be flexing in response to the change in pressure as the furnace turns on. Screwing an additional piece of metal into any weak spots in your ducts can solve this issue.
Banging may also indicate a gas-ignition problem that causes a small explosion as the furnace ignites. This is most likely the problem if you notice a change in the flame or if the furnace doors shake as the furnace starts up. This issue should also be addressed by a trained HVAC technician.
Squeaking
A squeaking sound as you walk near the furnace typically indicates that the ducts or metal panning may not have been secured properly. The solution usually involves reinforcing, rehanging or replacing the ducts and panning.
If you have any doubts about what is causing your furnace to make noise or if you aren’t versed in mechanical repairs, it’s best to err on the side of caution and contact a specialist. Houston HVAC technicians at Richmond’s Air stand ready to come to your aid at a moment’s notice. Contact us today for professional service.
