High low side pressure and low high side pressure (250 is a bit low
for the current outside temps unless you are in International Falls
or the mountains in Montana) make me think there is air in the system.
Air does not condense, so it raises the low side pressure
considerably (no significant expansion, not heat required) and hence
prevents the proper expansion of the Freon. If the system was
charged by pressure, it will be somewhat low on capacity due to the air.
Peter
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