Chrysler Colt/Vista 1990-1993 Repair Information

Pressure Switch

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OPERATION



The pressure switch, used on Colt with 1.6L engine, is used to control the 2-speed condenser cooling fan. The switch is normally located on the high pressure line near the left front of the engine compartment.

TESTING



  1. Install a manifold gauge set to the air conditioning system.
  2.  
  3. Check the continuity of the switch at different pressures. The switch should be open a pressures below 213 psi and closed at 256 psi or higher.
  4.  
  5. For the purpose of testing, the pressures can be lowered by using an auxiliary fan to cool the condenser and raised by placing a cover over the condenser to prevent air flow.
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  7. If faulty, replace the switch if faulty.
  8.  

REMOVAL & INSTALLATION



  1. Disconnect the negative battery cable.
  2.  
  3. Properly discharge the air conditioning system.
  4.  
  5. Remove the switch from the refrigerant line.
  6.  
  7. The installation is the reverse of the removal procedure.
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  9. Evacuate and recharge the air conditioning system.
  10.  
  11. Connect the negative battery cable and check the entire climate control system for proper operation. Check the system for leaks.
  12.  

 
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