Whenever we get called for a furnace malfunction, the most common complaint is that the furnace is making strange noises that the owner has never heard before. Below is a list of five common reasons why your furnace is making noise.
1. Heat Exchanger May Be Cracked
Cracked heat exchangers produce rattling sounds. Heat exchangers are usually made with metal coils that are heated through combustion to warm up the air. Over time, the expansion and contraction of these metal coils can cause them to crack, causing the rattling sounds as they expand.
2. Faulty Ignition System
Your furnace ignition system creates heat through combustion. A faulty ignition system is accompanied by clicking sounds produced as the igniter attempts to light. This could be caused by the following reasons:
- Dirty burners
- A bad valve preventing the gas from reaching the ignition system
- A broken flame sensor
- A broken thermocouple
3. Delayed Ignition
Delayed ignition can be caused by a low supply of gas, dirty burners, or when too much air mixes with gas. When this happens, your furnace makes banging noises when it turns on.
4. Expanding and Contracting Air Ducts
Normal air ducts make intermittent noises as they expand and contract. However, if the noises are oddly loud and more frequent, there may be an issue. Common causes are obstructed vents, dirty air filters, and ductwork.
5. Furnace Has an Electrical Problem
Although furnaces produce low humming sounds when running, a furnace experiencing an electrical problem causes noisy humming sounds. This results from poorly induced motors, faulty transformers, and unlubricated blower motors.
If you’re experiencing unusual noises from your furnace, Unitedly Service Group offers the best heating and cooling services in Rochester, Minnesota. Whether your furnace needs a repair or complete replacements, we have skilled experts who can repair all makes and models.
Unitedly Service Group can help you with heating and cooling services, indoor air quality, water heaters, boilers, humidifiers, zone controls, exhaust systems, rooftop units, and in-floor heating systems. We will get to your home fast and do proficient work, taking the necessary measures to preserve your property.
For more information, contact Unitedly Service Group in Rochester today.