How do you reverse polarity on air conditioning?

Answer 1

Ok gotta make sure this is explained correctly.

when you hook up L1,L2 to thier incorrect places on most units it would not matter because on a 240v unit the breaker is a double pole, this actually uses each wire on circuit breaker to independantly grab 120 volts from each wire as they both touch the same exact bus bar within. Thus it's really 1 circuit with dubble the voltage and the electron flow is balanced equally and is in phase with itsself so the unit cant tell.

I have only had to reverse the polarity intentionally, after struggling to replace this condenser fan and capacitor to a 23 yr old AC system with a generic fan with same voltage and rpm but had a smaller capacitor, the new motor was spinning counter clock wise there are leads in the rear of blower by switching these tapps the elecrtical flow thru windings was reversed and fan was spinning clock wise.

NOTE iss newer furnaces can sense if the Polarity is Reversed, the correct thing to do is find out weather the wire leading from the dissconnect or breaker was switched or crossed on accident, the solution is to just switch the new connection at unit side