Category Heating

5 Reasons Your Furnace Is Producing Noise

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.