wa8yxm wrote:
YOu said with the polarity reversal on teh box the A/C did not work.
The thing is. UNLESS you have somethign like a Progressive EMS or a TRC Surge guard which would have told you on it's face (or remote) what the problem is.. The A/C really does not care about polarity. No AC (Alternating current) device cares about polarity.. The issue is important only for YOU...
WHY. Well AC current flows the same no matter how you wire it up. but if it's backwards the danger of shock to YOU goes up. Seriously UP But the device actually can not tell unless (Like the Progressive Industries EMS) it is designed to do so
We have a 2 ton Coleman 2-stage AC unit. One stage is on one leg of 50A, 2nd stage is on the other. All I can assume is that somehow the single control board for both stages detected the polarity reversal and would not allow the AC to work. You are right, all other items worked properly.