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← ScienceWhich risk increases when an HVAC system exceeds thermal limits?
A)Refrigerant undergoes phase instability✓
B)Increased compressor efficiency threshold
C)Reduced heat exchange surface tension
D)Condenser gains improved thermodynamic stability
💡 Explanation
Exceeding thermal limits causes refrigerant phase instability because it approaches the critical point; therefore, the thermodynamic properties change unpredictably, reducing cooling capacity, rather than improving compressor efficiency which relies on stable phase transitions.
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