Which component controls the compressor on a cycling clutch TXV A/C system?

Which component controls the compressor on a cycling clutch TXV A/C system?

• A. Pressure cycling switch
• B. CCV
• C. Fin probe or thermostat
• D. Thermal switch

Answer: (C)

The thing that actually turns the compressor on and off in a cycling clutch TXV system is a temperature-sensing device tied to the evaporator. A fin probe or evaporator thermostat monitors the evaporator temperature and uses that signal to energize or de-energize the clutch coil. When the evaporator gets warm enough, the switch closes and the clutch engages, starting the compressor to provide cooling. As the evaporator cools, the switch opens and the clutch disengages, stopping the compressor to prevent over-cooling or icing. The TXV still meters refrigerant flow based on superheat, but the on/off cycling of the compressor itself is controlled by this temperature device, not by pressure alone.

The thing that actually turns the compressor on and off in a cycling clutch TXV system is a temperature-sensing device tied to the evaporator. A fin probe or evaporator thermostat monitors the evaporator temperature and uses that signal to energize or de-energize the clutch coil.

When the evaporator gets warm enough, the switch closes and the clutch engages, starting the compressor to provide cooling. As the evaporator cools, the switch opens and the clutch disengages, stopping the compressor to prevent over-cooling or icing. The TXV still meters refrigerant flow based on superheat, but the on/off cycling of the compressor itself is controlled by this temperature device, not by pressure alone.