EPA 608 Type II common mistakes
EPA 608 Type II · Understand the traps and how to avoid them.
Leak-checks only the flare fittings and service ports, then stops after finding one leak without surveying brazed joints, Schrader valves, and the rest of the circuit.
Time pressure and the assumption that a single leak explains the whole charge loss; flare fittings are easiest to reach and check.
What to do instead
Perform a systematic leak survey: use an electronic detector calibrated for the refrigerant, confirm suspected spots with soap bubbles, check every joint/valve/port, and isolate circuit sections if needed.
Uses a halide torch or open flame to search for leaks on HFC/HFO refrigerants.
Old CFC-era habit; the technician expects flame color change to indicate refrigerant and does not realize the method is ineffective and unsafe for many newer refrigerants.
What to do instead
Use an electronic leak detector rated for the refrigerant, or soap bubbles/ultrasonic detection; never use an open flame as a leak detector.
Fills a recovery cylinder until it feels full or until liquid stops flowing, exceeding the 80% capacity limit.
No scale is used, and the technician relies on cylinder feel or a float switch that may not be present or working.
What to do instead
Weigh the recovery cylinder on a scale, calculate the 80% fill limit from the cylinder water capacity and tare weight, and stop recovery when the scale shows the limit.
Recovers R-410A into the same recovery cylinder already containing R-22 or another refrigerant.
Convenience and cylinder shortage lead the technician to reuse whatever cylinder is available without checking the label.
What to do instead
Use dedicated, labeled recovery cylinders for each refrigerant; never mix refrigerants, and evacuate/label cylinders before use.
Uses the system compressor to pull the charge into an evacuated cylinder, or vents the remaining vapor because recovery is taking too long.
The technician lacks a recovery machine or wants to speed up the job and assumes the residual amount is too small to matter.
What to do instead
Use an EPA-certified recovery machine and recover to the required vacuum level; never vent refrigerant, and recover liquid first to speed the process.
Treats recycled refrigerant as reclaimed refrigerant and installs it in another customer's equipment without meeting the reclaim specification.
The terms recycling and reclaiming are confused; recycling only cleans refrigerant for reuse in the same owner's equipment.
What to do instead
Recycle only for reuse in the same owner's equipment; send refrigerant off-site to an EPA-certified reclaimer if it is to be used in different equipment or sold, and verify it meets AHRI 700.
Uses a recovery cylinder that was not evacuated before use or that previously held a different refrigerant, without cleaning or labeling it.
The technician assumes a closed cylinder is clean and ready, ignoring residual air, moisture, or old refrigerant.
What to do instead
Evacuate recovery cylinders before use, use clean dedicated cylinders, and label each cylinder with the refrigerant and date.
Confirms evacuation with the manifold gauge set's compound gauge in inches of mercury instead of a micron gauge.
The gauge set is already connected, and the technician believes a low inches-of-mercury reading proves a deep vacuum.
What to do instead
Use a calibrated micron gauge connected directly to the system, isolate the vacuum pump, and verify the vacuum holds after isolation.
Charges a blended refrigerant such as R-410A as a vapor from the cylinder into the suction line.
The technician treats the blend like a single-component refrigerant and does not account for fractionation.
What to do instead
Charge blends as liquid into the liquid line, or use a throttling valve to meter liquid into the suction line while the system is running.
Vents refrigerant during repair because the amount seems small, and uses recovery equipment that is not EPA-certified or does not keep required records.
The technician assumes small releases are acceptable and is not familiar with the venting prohibition, certification, and recordkeeping requirements.
What to do instead
Recover all refrigerant before opening the system, use only EPA-certified recovery/recycling equipment, and maintain required service and refrigerant records.