Practice question

On a TXV (thermostatic expansion valve) bus system, low cooling with low-side pressure too low and high superheat usually indicates:

  1. An overcharged system
  2. A shorted blower resistor
  3. TXV starving the evaporator (stuck closed, lost bulb charge, or restriction)
  4. TXV flooding the evaporator

Answer: C — TXV starving the evaporator (stuck closed, lost bulb charge, or restriction)

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