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Evaluating checks of air conditioning system pressure switch F129 > < Checking air conditioning system pressure switch F129

Polo Mk3

Checking switch part:
Checking switch part:
   
–  Briefly bridge connections between chambers -1- and -2- while engine is running. If the air conditioning system magnetic coupling -N25- switches on, the refrigerant circuit is empty.
The switch part between chamber -3- and chamber -4- of the connector housing switches the radiator fan -V7- to the second speed via radiator fan control unit -J293- when the pressure in the refrigerant circuit rises.
–  Closes above 16 bar and opens below 12.5 bar (switching threshold).
  V87-1360

Evaluating checks of air conditioning system pressure switch F129 > < Checking air conditioning system pressure switch F129