ASE G1 Auto Maintenance and Light RepairHeating and Air Conditioning (HVAC)Easy
Which type of refrigerant is commonly identified by its green connections or service ports on an automotive AC system?
- AR-12
- BR-1234yf
- CR-134a
- DR-22
Show answer & explanationAnswer & explanation
Correct answer: B. R-1234yf
R-1234yf, a newer refrigerant, is mandated to have distinct green-colored service port caps and specific fittings to prevent cross-contamination with older refrigerants like R-134a.
Why the other options are wrong
- A. R-12 systems typically have threaded fittings and are not green.
- C. R-134a systems have quick-disconnect fittings and are typically black or blue for low side and red for high side, not green.
- D. R-22 is not used in automotive AC systems.
Refrigerant Identification (R-1234yf)
Distinctive visual indicators used to identify the R-1234yf refrigerant type in an automotive AC system, crucial for preventing cross-contamination.
- Uses unique 'green' service port caps and fittings.
- Designed to prevent accidental mixing with other refrigerants.
- A newer, lower Global Warming Potential (GWP) refrigerant.
Memory trick: Green's Good for the new Generation.