What happens if the TXV is not properly controlling superheat?

If the TXV (Thermostatic Expansion Valve) is not properly controlling superheat, it can lead to inadequate refrigerant flow to the evaporator, resulting in poor cooling efficiency and potential compressor damage due to low refrigerant levels. Conversely, excessive superheat can cause liquid refrigerant to return to the compressor, risking compressor failure or overheating. This imbalance can also lead to increased energy consumption and reduced system performance. Proper superheat control is essential for optimal HVAC system operation and longevity.