Refrigerant Circuit Component Arrangement

WARNING: This page is about a different car, the 2018 Volkswagen Jetta, 2017 Volkswagen Jetta, 2016 Volkswagen Jetta, and 2015 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.

All components of the refrigerant circuit submitted for quality observation are always to be sealed (use original sealing caps of original part).
Replace damaged or leaking components of refrigerant circuit. Refer to COMPONENTS, REPLACING .
Excess pressure is generated if too much refrigerant or refrigerant oil is added, the condenser is contaminated, the radiator fan is faulty, the system is blocked or if there is moisture in the refrigerant circuit (the restrictor or expansion valve freezes).

High pressure side are the condenser, receiver/dryer and restrictor or expansion valve to separate the high and low pressure liquid ends.

High pressure results from the restrictor or expansion valve forming a constriction and causing the refrigerant to accumulate, thus leading to an increase in pressure and temperature.

Excess pressure results if too much refrigerant or refrigerant oil is used, the condenser is contaminated, the coolant fan is malfunctioning, the system is blocked or if there is moisture in the refrigerant circuit (the restrictor or expansion valve freezes).

Low pressure side are the evaporator, reservoir, evaporator temperature sensor and compressor to separate high and low pressure gas ends.

A drop in system pressure can occur due to loss of refrigerant, restrictor or expansion valve (restriction not given), A/C compressor malfunction or iced evaporator.