Expansion Valve

The expansion valve meters the flow of refrigerant going into the air conditioning evaporator.

Symptoms of a Bad or Failing Expansion Valve

  • Air from AC is not very cold
  • A expansion valve is used in a system that has a receiver dryer in the high pressure (liquid) line

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1990 Mercedes-Benz 190E
Since the a/c isn't working,i'm changing to the new freon. replaced condenser(leaking) receiver/dryer and heater...