Thermal Expansion Valve (TXV) Here, the system changes from the high-pressure side to the low-pressure side. If you were to touch this part of the system, you'd feel it change from hot to cold. The high-pressure liquid refrigerant flows from the receiver-dryer through the expansion valve...
How Much Does it Cost to Replace a TXV Valve (2025) The average TXV replacement cost by an HVAC tech in 2025 is roughly $800-$1250. The cost to buy a TXV Valve in 2025 is roughly $50-$300. Prices can vary by location and time of year. If you have had the TXV valve replaced,...
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. Figure 2 shows the different...