Which effect arises when an automotive air conditioning system's expansion valve freezes?

💡 Explanation

Refrigerant pressure oscillates because the expansion valve's blockage interrupts the refrigerant flow, initiating unstable evaporation. This causes surging 'hunting' cycles, of high and low pressure, therefore, oscillating pressure results rather than compressor failure which happens over longer periods.

• Which outcome occurs when resonant frequency rises excessively in piezoelectric crystal used for actuators?
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• Which consequence results when magnetic confinement fails within a tokamak reactor?
• Which phenomenon limits ionic conductivity in solid-state electrolytes as temperature decreases?
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• Which consequence occurs when an impurity disrupts silicon's conduction band edge?