E609 EPA MVAC A/C Refrigerant — practice test
Studying for E609 (EPA MVAC A/C Refrigerant)? Overhaul Prep has 161 verified E609 questions written to the current task list — in the same formats the real exam uses (direct, Technician A/B, EXCEPT and most-likely-cause). Every answer comes with a written explanation, so you learn why instead of memorising a letter.
Sample E609 questions
Straight from the bank — answers highlighted, with the explanation underneath.
Which A/C component changes low-pressure liquid refrigerant into a low-pressure vapor by absorbing heat from the passenger-compartment air?
- Condenser
- Evaporator
- Compressor
- Receiver-drier
Technician A says the condenser is on the high side and rejects heat to condense vapor into liquid. Technician B says the evaporator is on the low side and absorbs cabin heat, boiling liquid into vapor. Who is correct?
- Technician A only
- Technician B only
- Both Technicians A and B
- Neither Technician
The A/C blows warm and the compressor clutch never engages. Both the low-side and high-side pressures read equal and low. The MOST likely cause is:
- An overcharge
- A low refrigerant charge opening the low-pressure cutout switch
- A faulty blend door
- A restricted orifice tube
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