The answer to 'thermostat making noise' is that a noisy thermostat is often caused by a faulty or malfunctioning component inside the unit. Common symptoms include clicking, buzzing, or humming sounds coming from the thermostat. This can be due to issues with the internal wiring, electrical components, or the thermostat's mechanical parts.
In many cases, a noisy thermostat can be fixed by a DIY homeowner. However, if the issue persists or you're unsure of the cause, it's best to call in a professional HVAC technician to properly diagnose and repair the problem. Attempting complex repairs on your own could potentially damage the thermostat or other HVAC equipment, leading to more expensive repairs down the line.