Embodiments are described herein to provide a functional composition that can be added to the lubricant of the HVAC system to help prevent/reduce the lubricant breakdown. The functional composition can also help prevent/reduce material deposition on, for example, an orifice of an expansion or heat transfer surface(s) or heat transfer surface(s). The functional composition can be added as an additive to a lubricant of a HVAC system to form a lubricant composition. The lubricant composition can be added to a HVAC system to help prevent/reduce the material deposition. In some embodiments, the functional composition can be added to a HVAC system during operation of the HVAC system to help remove/reduce existing material deposition.