Practice Test Geeks(CAR) Certified Appliance Recycler Practice Test
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Troubleshooting & Diagnostics Flashcards

7 cards from real CAR practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Troubleshooting & Diagnostics flashcards as text

  1. A window air conditioner blows warm air even though the compressor is running. The most likely cause is:

    Answer: Low refrigerant charge due to a leak

    Low refrigerant from a leak reduces heat absorption capacity, so the compressor runs but the unit cannot cool the air effectively.

  2. During intake inspection, a dehumidifier runs but collects no water. What should be checked FIRST?

    Answer: Bucket float switch function

    A stuck or faulty bucket float switch can signal 'bucket full' when it is not, shutting off collection even when the unit runs and the refrigerant system is intact.

  3. A dishwasher does not drain at the end of the cycle. After checking the drain hose for kinks, what is the NEXT diagnostic step?

    Answer: Test the drain pump motor for continuity

    If the drain hose is clear, the drain pump motor is the next logical suspect; testing continuity confirms whether the motor has an open circuit.

  4. A gas range igniter sparks continuously on all burners even when no knob is turned. What is the MOST likely cause?

    Answer: Moisture or debris on the igniter switch contacts

    Moisture or food debris bridging the igniter switch contacts creates a continuous circuit, causing all igniters to spark without a knob being turned.

  5. What is the purpose of measuring a compressor's amperage draw during diagnosis?

    Answer: To confirm the compressor is operating within its rated load

    Comparing actual amperage draw to the nameplate rating reveals whether the compressor is overloaded, underloaded, or operating correctly.

  6. A top-load washer agitates but will not spin. Which component is the MOST likely cause?

    Answer: Lid switch or lid lock assembly

    The lid switch is a safety interlock that must be closed to allow spin; a failed switch signals 'lid open' and prevents the spin cycle.

  7. When testing a thermal fuse in an appliance with a multimeter set to continuity, no beep indicates:

    Answer: The fuse has blown open and must be replaced

    A thermal fuse that has blown is an open circuit; no continuity beep means current cannot pass through it and it must be replaced.