I absolutely hated the POA replacement system with the pressure switch and went back to a POA valve. We fought and did everything we could think of but the system would cycle with vent temps getting down to 38° and then cycle off with temps going up to 46°. We could lessen the span but it would then cycle 42 to 44 degrees. Put the system back to stock and we had 38° all the time. This was with R12 and we just couldn't shorten up the cycle without raising the output temps. Inside the cabin I would just start thinking that things should be cooler and it would kick on and get cooler, then up and down over and over. Came across the Arizona desert with outside temps at 105° and we were always comfortable, although that was just on the edge of comfort with no room to spare. All we did was put the original POA valve back in and recharge the system so we ruled out something else being off.
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Mick Batson
1967 original owner Tyro Blue/black top 4-speed HO GTO with all the original parts stored safely away -- 1965 Catalina Safari Wagon.
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