Came across something a bit puzzling in last evening’s inspection I’ve not encountered before.
The house had a relatively old AC condenser (evidently manufactured in 1987 per serial # and style, round Comfortmaker design as common around then), and the outside air temperature was about 50F, too cold to run it. The fan blade turned easily when pushed with a twig.
When looking at the furnace/blower unit, I noticed what looked like a water spot on the floor that turned out to be some sort of oil, which I then saw was dripping from the coolant line where it exited the bonnet.
So, my questions for AC specialists:
What’s going on here?
Does this have any implications regarding the performance of the unit?
I intend to report the unit as more-or-less at the typical life expectancy of such a unit and likely to be considerably less efficient than a more modern unit, and recommend a servicing checkup by a licensed specialist anyway, but I am curious as to the significance, if any, of this.