When a compressor burns out, highly acidic oil is formed. Although the majority of the oil remains in the compressor (which will be removed and replaced), some oil is always present in the plumbing and remaining components in the system. If you are changing the entire system, including any piping between components in a split system, then there are no issues. However, if you are not replacing the piping between components or other parts of the system, then you must flush those components with Qwik System Flush® to remove the residual contamination from the burn out. However, never flush a compressor or filter drier, and always back flush components whenever possible.
For more information on how to use Qwik System Flush® after a compressor burn out, see the Instructions link on the product page.