Automotive Servicing NC III

Practice session

A technician connects a manifold gauge set to a malfunctioning automotive A/C system. With the ambient temperature at 32°C (90°F) and the engine running, both the low-side and high-side gauge pressures read abnormally high (Low-side: 65 psi, High-side: 380 psi). What is the most likely cause of these readings?

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