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Checking switch part: > < Checking high-pressure safety valve on air conditioner compressor

Polo Mk3

Checking air conditioning system pressure switchF129
Checking air conditioning system pressure switch -F129-
  Note
t  The pressure switch can be removed without extracting the refrigerant from the refrigerant circuit.
t  Visual check: ensure that O-ring 10.8 mm x 1.8 mm is seated in groove.
   
Switch part between chamber 1 and chamber 2 of connector housing switches air conditioning system magnetic coupling -N25- off when refrigerant circuit is insufficiently filled or pressure is too high:
–  Opens below 1.2 bar and closes again above 2.4 bar (switching threshold).
–  Opens above 32 bar and closes again below 24 bar (switching threshold).
  V87-1360

Checking switch part: > < Checking high-pressure safety valve on air conditioner compressor