What Is the Function of Txv Valve
A Thermostatic Expansion Valve (Txv) (See Figure 1) Is a Refrigeration and Air Conditioning Throttling Device That Controls the Amount of Refrigerant Liquid...
A thermostatic expansion valve (TXV) (see Figure 1) is a refrigeration and air conditioning throttling device that controls the amount of refrigerant liquid injected into a system’s evaporator—based on the evaporator outlet temperature and pressure—called the superheat.
How do I know if my TXV valve is bad?
- Low evaporator pressure.
- High evaporator and compressor superheats.
- Low compressor amp draw.
- Short cycling on the low-pressure control.
- Higher than normal discharge temperatures.
- Low condensing pressure.
- Low condenser split.
- Normal to high condenser subcooling.
What happens when TXV fails?
If the TXV fails closed, it can be said to be “underfeeding,” which means that not enough boiling refrigerant is fed through the evaporator coil; superheat will be too high at the evaporator outlet.
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