While all furnaces make noise when in use, some sounds call for a closer inspection. If your system has started making strange noises, it's generally recommended to turn off the unit and schedule service immediately so that a professional can identify and resolve the problem. Here are some common furnace noises that should alert you that something is wrong with the system.

3 Strange Furnace Noises & What They Mean

1. Booming

If you have a gas furnace, booming noises upon start-up require immediate inspection. Booms and bangs are often caused by too much gas entering the chamber, which causes a loud noise when it ignites. This problem can result from dirty burners, which delay ignition and allow gas to accumulate within the system. Problems with the pilot light, such as a weakened flame, can also lead to gas buildup. In either case, prompt service is necessary to prevent a possible health and safety hazard. 

2. Rattling

Slightly less serious than booming, rattling within furnaces usually results from gradual wear and tear. Heating equipment is composed of many moving components, including fans, motors, belts, and hardware. Over time, these components can become loose as the furnace operates. When loose, they rattle and clank against other components and cause frustrating noises. Luckily, gradual wear can be addressed by yearly furnace maintenance, which will fix issues before they become more serious. 

3. Squealing

Heating equipment uses blower fans to push heated air into your air ducts. These blower fans are attached to motors, which require belts to operate. However, if the belt slips, it can squeal as it oscillates within the system. In this case, you may need components tightened up, or the fan belt might need to be replaced. An HVAC specialist can diagnose the exact problem and replace damaged parts as needed. 

If your furnace has started marking strange noises, reach out to Rick Ogden Heating & Air Conditioning in Loveland, OH. They have provided dependable HVAC assistance to customers since 1982. In addition to repairs, they also perform preventive maintenance to keep your system functioning smoothly. Learn more about their services by visiting the website, or call (513) 683-3714 to schedule a free estimate. If you have an HVAC emergency, please call (513) 880-2493 for immediate assistance.