look at this site HVAC is clicking noise, it’s very likely a problem that needs to be fastened by a local Specialist technician because most of the components involved with a clicking issue immediately influences another part of the system and might break other areas of the device Otherwise handled with right care.There's two different types of HVAC system noises: sounds that reveal malfunction and Seems that happen to be ordinary. Before you begin looking for an answer to your HVAC sound, additional reading you need to determine if it’s regular or not.