1983, condo project had specially designed down flow A/Hs made by York that used off the shelf components. The coil boxes had York badges on them that, when installed, were upside down...no biggie. Buyer complained of no cooling, plaguing my boss for a week. Finally he sent me and my mech out to see what we could do, since the H/O wouldn't listen to any of our techs.
Got there to find he was a retired engineer and that he believed the problem was that the A/H was installed wrong. We left him in the LR, went upstairs and stood there looking at the A/H for a few moments. We looked at each other with that "you thinkin' what I'm thinkin" look, popped the badge out and turned it---and the spec sticker---right side up. After 20 minutes of rattling tools and thumping the cabinet for effect, we came down stairs.
My mech asks, "Notice any difference?". "Yes, you guys are the best...", walks upstairs, sees the swapped tags and says, "...I was right, wasn't I? Those guys (meaning me and Steve as we did the original rough ins and installs) didn't know what they were doing."
...sigh...
(The wise men of modern thought) adore a god made of putty or of wax - plastic, effeminate, molluscous, with no masculine faculty about him, and no quality that entitles him to the respect of just and honest men, for a being who cannot be angry at wrongdoing is destitute of one of the essential virtues, and a moral Ruler who is not angry with the wicked, and who refuses to punish crime, is not divine. ---Spurgeon