Update on MY A/C... One of my rooftop units has been tripping its 20 amp branch breaker... I put a meter on the wire and confirmed,, IT IS THE A/C not the breaker.. So this AM I got the ladder down, went topside with ye old screwdriver and ye old air shooter, pulled the covers and blasted the unk to .. somewhere else... About 2/3 of the condenser was covered with fibrous stuff that builds up on those things.. It's all clear now.
Came back down and turned it back on and ... no click of darkness on that line all day, still working as I type 11 hours later.