The Master-Bilt 09-10488 Thermal Expansion Valve (TXV) regulates the flow of refrigerant into the evaporator to support consistent cooling performance. It works by responding to changes in refrigerant temperature and pressure, adjusting the amount of refrigerant supplied to match the cooling system's requirements. This controlled flow helps maintain proper evaporator operation and sup... https://partsfe.ca/master-bilt-09-10488-thermo-expansion-valve/2-09-10488.html