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Which of the following components of an air conditioning unit USUALLY has the longest expected service life?
  1. Compressor
  2. Evaporator coil
  3. Condenser coil
  4. Air filter
Answer: C - The condenser coil is usually the component of an air conditioning unit with the longest expected service life. Compressors can last up to 15 years. Evaporator coils often last around 10 years. Air filters need to be changed monthly or at least every six months depending on how frequently the unit is being used. Condenser coils can outlast these other elements by several years. However, it is important to know that once the condenser coil is no longer functional, the entire air conditioning unit has to be replaced.
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