Prepare for the ESCO Air Conditioning Exam. Utilize flashcards and multiple choice questions, complete with hints and explanations. Get ready to ace your exam!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.


Which of the following is not a symptom of a hermetic system that is low on refrigerant?

  1. Frost on the suction line

  2. High head pressure

  3. Low suction pressure

  4. Warm air from vents

The correct answer is: Frost on the suction line

Frost on the suction line is not a symptom of a hermetic system that is low on refrigerant. When a system is low on refrigerant, it causes a decrease in the pressure and temperature of the refrigerant within the system. This leads to symptoms such as low suction pressure, high head pressure, and warm air coming from the vents. Frost on the suction line is typically associated with issues like a restricted or partially blocked metering device or a dirty air filter, rather than low refrigerant levels.