ASE Heating and Air Conditioning Multiple Choice Practice Test

Question 1 of 3
83% Get this Question Right
Customer complains of a foul odor from the dash when the AC and blower are on. Tech Y says a clogged evaporator drain is the cause. Tech Z says it's caused by bacteria growing on the evaporator. Who is right?
Tech Z
Both Tech Y and Z
Tech Y
Neither Tech Y nor Z