Final answer:
In an orifice tube system, undercharging of refrigerant causes frequent cycling of the air-conditioning clutch due to pressure changes, potentially leading to excessive wear.
Step-by-step explanation:
In an orifice tube system, an undercharge of refrigerant will cause frequent cycling of the air-conditioning clutch. Due to the lack of sufficient refrigerant, the pressure within the system will drop, causing the pressure switch to frequently disengage and engage the clutch, as it falls below and rises above the pressure threshold, respectively.
This frequent cycling can lead to excessive wear over time. It is important to ensure that the air-conditioning system is properly charged to maintain optimal performance and prevent damage.