Has your furnace become increasingly chatty recently? Strange noises like bangs and screeches often indicate an immediate need for furnace repair if you don't want to risk losing functionality when you need it most. The following information can help you interpret odd furnace sounds, so you can schedule service with an HVAC contractor.

What Noises Should You Have Investigated By a Furnace Repair Specialist?

1. Banging/Popping

Minor banging or popping noises emanating from the air ducts result from expanding and contracting metal, which is caused by a change in temperature. However, extremely loud bangs during operation imply a soiled ignition system, especially if the noises occur upon startup. Banging is also linked to problems with the bypass damper, which is supposed to absorb sound during operation.   

2. Screeching

Most furnaces come equipped with large motors known as air handlers, which contain bearings. Bearings will need to be lubricated over time to enhance operation, but when allowed to dry out, screeching noises are quite common. They may also be a sign your belt needs to be replaced.

3. Scraping

The sound of metal components scraping together usually suggests a problem with the blower wheel, which is responsible for transferring air out of the furnace and into the house. When the mounting becomes broken or loosened, it can result in the wheel making contact with the casing, which causes the noise. 

With cold weather descending, turn to County Line Heating & Air Conditioning, to ensure your heating system is operating efficiently. Providing customers in and around Tulsa, OK, with high-quality furnace repair and maintenance for more than 35 years, these professionals can also help out with repair of thermostats, heat pumps, and air conditioning units. Visit them online for their complete list of services. If you’d like to schedule a visit at your home, feel free to call (918) 455-3463 today.