Vacuum Pump FAQs
On average, a common AC technician does not need to change oil with two years. Pay attention to oil level, if you used it for long time and oil level is low than minimum, you need to add more oil. Usually you don’t need to add oil.
Usually one of these three reasons trigger oil change:
- Rotary pump starts taking longer to create vacuum or is unable to reach the desired vacuum level.
- Color of oil changes from transparent or golden yellow to dark brown indicating oxidation.
- Some engineers prefer to change oil after a fixed number of working hour which are either recommended by manufacturer or are based on experience.