Strange sounds coming from your HVAC system are a warning sign that something is wrong. You can get an idea of what may be damaged based on the type of sound. Squealing, banging, rattling, abnormal clicking and thwapping are sounds you never want to hear from your HVAC system.

1. Squealing

A squealing sound from the HVAC system usually means a belt has gone bad in the blower motor or it’s in need of lubrication. You can lubricate the belt yourself if it’s accessible and by using the right kind of oil for that particular brand and model. If the belt is worn, you need it replaced before it snaps and causes more costly damage.

2. Banging

Immediately turn your system off when you hear banging and contact an HVAC company for service. Controlled Climate Services offers 24/7 emergency repair service in the Kennesaw and Lumpkin areas. Banging sounds indicate that a component in your system is broken or disconnected.

3. Rattling

Often your HVAC system will begin with rattling before it progresses to banging. Rattling sounds mean that something is starting to become loose. You need to call an HVAC repair company to fix it. Ignoring the rattling will lead to a part breaking or disconnecting, which is a more expensive repair.

4. Clicking

You should only hear a clicking sound when the HVAC unit turns on and off. If you hear clicking outside of these occasions, then there might be something wrong with the electrical control. Another possible reason behind clicking is a defective relay. An HVAC technician will be able to diagnose and fix the problem to keep your unit operating properly.

5. Thwapping

Thwapping sounds usually signal that debris is stuck in the blower blades. When you don’t remove the debris from the blower blades, the motor will wear out faster. Another potential cause is an object inside the housing making contact with the blower.

Controlled Climate Services offers has NATE-certified technicians that can solve any problem behind your HVAC system’s strange sounds in Kennesaw. We can service any make and model of heating, cooling and HVAC systems. Other services we offer are installation and maintenance. You can help prevent the need for repairs through routine maintenance.