SESK: Stuff Everyone Should Know · sesk.info/epa-wait-for-pressure-rise
After reaching the required recovery vacuum, what does EPA's test outline say to do before opening the system?
Wait a few minutes and watch for a pressure rise.
- Open it right away
- Heat the system to 200 F
- Wait a few minutes to see if pressure rises ✔
Why: If system pressure rises after you reach the required vacuum, there is still liquid refrigerant in the system or in the oil. EPA's Type II and Type III test topics both include this waiting step.
Huh, didn't know that: Recovering liquid at the beginning of the recovery process speeds the job up.
The word queue is ironic. It's just q with a bunch of silent letters waiting in line.
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References
Answer: Wait a few minutes to see if pressure rises. If system pressure rises after you reach the required vacuum, there is still liquid refrigerant in the system or in the oil. EPA's Type II and Type III test topics both include this waiting step.
- EPA Section 608 Technician Certification Test Topics www.epa.gov/section608/test-topics
Need to wait a few minutes after reaching required recovery vacuum to see if system pressure rises
Checked 2026-10-10. - EPA Section 608 Technician Certification Test Topics www.epa.gov/section608/test-topics
Recovering liquid at beginning of recovery process speeds up process
Checked 2026-10-10.
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