Restoration - Ford Suction Valves

Suction Valves

(POA, By-Pass, Suction-Throttle)

What is a suction valve?

The suction valve (aka Suction Throttle, By-Pass or POA Valve) is found on some late 60’s & through early70’s Fords. It is mounted to the evaporator’s suction (top) outlet and regulates 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. More on Converting to 134a!

For more information on restoring your Suction Valve, please call or Message Us!

Due to market changes, we have made the hard decision to no longer offer restoration services. We do offer replacement upgrade kits and bolt in aftermarket kits to cover the void.