How to Tell Your Heating and Cooling Service Provider What Sound Your System is Making Posted May 4, 2017 Your system has a array of sounds that it usually makes. For the most part, they should fade into the background. If your system is making bizarre or disruptive sounds, you should call in a certified technician for a service visit.Listen thoroughly to the sounds you’re hearing, shut off your system and call in pros like C-N-O Comfort Zone. Your system might simply have a disconnected piece. The noises could also be an signal that considerable repairs are needed. If you know how to talk about the sounds your system is making, you can help your service technician create a solution.Here are some familiar sounds that signify a need for heating and cooling service:Repeated clicking—You can hear a clicking sound when your system turns on and off, if you listen well. This is normal. However, if you hear this sound again and again, you likely need a heating and cooling service appointment to find out if it’s a problem with the system’s relay or its electrical control.Rattling, banging, clanking or thumping—Rattling usually hints at a loose piece. Strong banging or thumping sounds could mean a part of your system is totally broken or disconnected. Routine maintenance can prevent some of these noises from ever starting. If you schedule maintenance appointments with C-N-O Comfort Zone, we can point out and repair potential problems before they can get worse. Give us a call at 636-255-8997 or use our convenient online scheduler to make your appointment.