Volkswagen Polo Service & Repair Manual: A/C Pressure Switch -F129
 Note
| For switching pressures, removing and installing switches
and switch arrangement and version, see vehicle-specific
refrigerant circuit. |
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| This pressure switch has 3 functions: |
| 1. Switches the coolant fan to the next higher level when
the pressure in the refrigerant circuit increases (approximately
16 bar (232 psi)). |
| 2. Switches off A/C system if pressure is excessive
(approximately 32 bar (464 psi)), for example. because of
insufficient engine cooling. |
| 3. Switches off A/C system if pressure is insufficient
(approximately 2 bar (29 psi)), for example. loss of
refrigerant. |
Note
| A/C Pressure Switch -F129- replaces the A/C Refrigerant High
Pressure Switch -F23-, A/C Refrigerant Low Pressure Switch -F73-
and the Magnetic Clutch High Pressure Switch -F118-. |
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Note
For switching pressures, removing and installing switches
and switch arrangement and version, see vehicle-specific
refrigerant circuit.
...
Note
For switching pressures, removing and installing switches
and switch arrangement and version, see vehicle-specific
refrigerant circuit.
...
Other materials:
A/C Compressor with A/C clutch
Caution
Non-approved tools or materials such as leak sealing
additives can cause damage or malfunctions in the
system.
Only use tools and materials approved by the
manufactu ...
Vibration, Road Test, Performing Before Balancing
If a vehicle comes to the workshop with the complaint
“vibration”, a road test must be performed before balancing the
wheels.
That way, information about the type of vibration can be
obtained.
Obser ...
Contacts in Contact Housing, Repairing
First, open or release if necessary the secondary lock of
the contact housing. Refer to
→ Chapter „Contact Housings, Releasing and Disassembling“.
–
Release contact (primary ...
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Refrigerant Circuit Connections with Valve for Switches
High Pressure Sensor -G65