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Originally Posted by al parker
I will vote for replacing the valve while you're already working on the system for a couple reasons. You don't know the history of the A/C unit, it may have an expansion problem that is unknow at this time and the big reason is it is easier now than it will be later after you gas the unit back up and perhaps find it isn't working correctly.
Good Luck
Al
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You could make the same argument about any component in the HVAC. You don't know in advance whether anything else works or not, so why not change everything?
Personally, I'd not throw parts at it until I knew said parts were necessary.