Ford POA Valve NOS YG-159
New Old Stock replacement part for 1975 Ford Granada and 1975 Mercury Monarch
Air Conditioning Tip
If you are replacing your POA Valve on an otherwise operating system, its failure is likely as a result of contaminants causing it to stick in the open position, forcing it to constantly by-pass.
As is the case with any air conditioning system, flushing the system to insure that re-used parts do not contaminate newly replaced or restored parts and replacing or restoring the car's Filter-Drier are essential to avoid a repeat of the same problem.