Technician a says that checking refrigerant odor (hc smell) is a reliable way to check for contaminated refrigerant. technician b says that refrigerant with more than 2% of a foreign refrigerant normally should be sent off for reclaiming or disposal. which technician is correct?

Technician B

Explanation:

Mixing of two refrigerants would result into sub-cooling which consequently damages the system. It’s important to note that checking the odor of refrigerant cannot be traced hence unreliable method for checking contaminated refrigerant. Therefore, refrigerant with more than 2% of a foreign refrigerant normally should be sent off for reclaiming or disposal .

i guess it’s a and b