Because of the scarcity of this part we can only rebuild your unit - The STV Valve is located at the evaporator outlet, controls the amount of compressor suction / refrigerant flow through the evaporator to prevent evaporator core freeze-up. - 1 year warranty
They valve is mounted to the evaporator’s suction (top) outlet and regulate system pressures so as to prevent the evaporator from freezing up.
Why restore my suction valve?
A good indication that your suction valve has failed or is failing is a high low-side system gauge reading. This is either as a result of contaminants locking the valve or clogging the valve up or valve failure. If you’re converting to 134a, your valve will need to be properly calibrated as by-pass pressures differ from that of R12.